Who Are the Fae of 2042?

Changeling: The Dreaming is set in the late 20th century, when King David ruled Concordia, the alliance of changeling courts of North America. This game keeps the same ruleset, but plays the history out a little.
By 2042, King David is long dead, and there is no longer any political structure uniting the fae of the North American continent. Instead, changelings -- much diminished in number, as humans abandon creative pursuits for the mundane burden of survival -- are organized into protective groups that may span a few counties, at most.

What does this mean for player characters?

Most obviously, you know very few fae. If you are an extremely well-connected changeling, you've probably met a dozen other fae in your lifetime. It's a little like being gay in an era when homosexuality was illegal. Unless you're from a big city, you may not know any other gay people (that you know of).
On the other hand, your virtual changeling community -- what we now think of as an "online" community -- is probably larger than the number of fae you've met in person. Online connectivity has become faster, cheaper, and more varied each decade. Even a poor person likely has a pocket device -- available at Walmart -- that lets her visit a lover or business contact in hologram form, maybe even with a few VR touches. (Of course, the entirety of the conversation, down to the gesture, is being monetized as Big Data somewhere ... )

Is there still a fairy Court?

Chattanooga is at the hub of a fairly powerful duchy, the Duchy of Southeast Tennessee and North Georgia. (In fact, Georgia has been pretty quiet lately.)
Kate, Duchess of Southeast Tennessee, presides over a joint Seelie/Unseelie court that includes Bledsoe, Bradley, Grundy, Hamilton, Marion, McMinn, Meigs, Polk, Rhea, and Sequatchie Counties, though most fae tend to use watersheds to define their territories -- Her Grace's territory is almost, but not quite, continuous with the Lower Tennessee River Watershed of the Tennessee River Basin. It's also exactly continuous with the old jurisdiction of the Tennessee Department of Environment and Conservation's old Chattanooga Field Office, back when government took an interest in environment and conservation. That's going to be important later.
Here's the Lower Tennessee River Watershed:

And if you want to learn more about Tennessee hydrology, go here: http://www.tn.gov/environment/topic/wr-ws-watershed-stewardship
What do you know about Her Grace? She's been alive since the 20th century, she's neither/both Seelie and Unseelie, she's definitely a Sidhe, and she's said to be a hermaphrodite. You've never met her.

What about you?

As a changeling, you have access to any of the Kith in the Changeling: The Dreaming book, as well as the list of Native American (southeast US, please) Kithain in the player's guide.
Like most changelings, you vacillate between Seelie and Unseelie; no need to stake out a preferred court unless you really want to.
You may have a clan or House, but there are so few changelings around that you likely don't have any direct connection to your House. Saying you're "Fianna" is like me saying I'm "Irish" ... it's true, but my people haven't been in Ireland for almost 400 years and I only know about Irish culture from books and the Internet. So feel free to claim a House for character color; it won't have much storytelling influence.
You may use any of the arts, bunks, and, cantrips -- and take any of the faults and merits -- in the Changeling: The Dreaming second edition book or the accompanying PG. (The PG isn't necessary unless you're a Native fae, but it does have great descriptions of each kith; excellent for backstory and color.)
Be aware that currency has devaluated. Any Resources you pick will mean less than they do now; ie. being middle class no longer implies home or car ownership. Medical care is typically something only the wealthy can obtain. On the other hand, IT is cheap and easily accessible.
How do you make a living? Imagine the "Gig economy" taken to the nth degree and run into the ground. On the one hand, this fits faes' whimsical natures. On the other hand; there's no social or occupational safety net; physical survival is going to occupy a lot of your  time.
Here's a typical street boggan:

Changeling occupations are much as they have always been: any of the creative fields, from arts and crafts to "high" art to any form of inventing and programming. Typically, you work freelance; since electricity is scatty, you may rent a desk in a "workspace" that guarantees the power will stay on and offers air conditioning (yay!) and coffee. You may also work in a mechanical field (plumber, mechanic); there's some factory work, though not enough to meet demand. You can work in the social sciences, but it will likely be volunteer work; government no longer pays for social workers or nurses or any "squishy" stuff. Government really doesn't do much nowadays ... there are private charitable organizations you could work for, though. Private environmental groups are the only guardians of the environment, so that would be a great choice for a nature-loving fae. You are also quite welcome to play as a street person or "urban hunter gatherer." Prostitution, street performance, and drug sales are also reasonable choices.

Yes, there's corporate life.

In Chattanooga, you'll find it in the mountains that circle the city, or in a few old structures like the James or McClellan building, or in floating "isles" that hover in the air like dirigibles and may be mechanical or magical (you don't know, but they're a common feature of urban landscapes). "Isles" have at least some landscaped features, as well as structures, and they may house wealthy neighborhoods, exclusive parks, or economic endeavors.
Minecraft may have inspired some flying structures ...

People tend to hate corporations, while fighting like mad to get into one. Most soap operas focus on corporate doings. If you've met a corporate magistrate, he's likely extremely handsome, clean, and healthy looking. He has all his teeth. He doesn't have pox scars. He doesn't exactly have a changeling vibe, but there's something about him that reminds you of a Sidhe ...

Are there vampires?

As to the other denizens of World of Darkness ... you've heard of them. Vampires, weres, and magi are all rumored to exist. You've never met one.

Are there gods?

Again, you've never met one. Christianity, especially evangelical Christianity, is the dominant religion in these parts, but you've never seen Jesus. Fae are rarely Christian, but you certainly can be a believer if you wish. You know changelings who follow Native American religion, Celtic religion, ancient Greek religion ... Oberon and Titania are popular deities, as are Herne, Lugh, Mab ... if you pick a religion, you may well meet your god (yes, including the Judeo/Christian God). He or she will likely have no stats and no ability to rescue your ass. However, the conversation may be illuminating ...
All gods except monotheistic gods may be (extremely rarely) encountered in the Dreaming. If you are a monotheist, your "take" on the Dreaming is likely that it is a particularly salient psychological construct. Go figure. The theory is that monotheistic gods visit the Dreaming because they won't risk the embarrassment of meeting another god who "doesn't exist" ...

What's the Dreaming like?

You get to design your own Dreaming. Decorate it how you wish! It's *your* dream, after all. The Storyteller may add whatever she wishes, too, though. Don't be surprised if a talking panda shows up in your Celtic forest.
Physically, the Dreaming is somewhat continuous with the real SE TN landscape, though without much human construction. It's as if the 18th-21st centuries never happened, except what changelings have made. So ... go make some things!
However, there is one key point of confluence: waterways, especially aquifers and to some extent surface water. Groundwater has a ONE-ON-ONE correspondence to the dreaming. Think of ley lines, except also necessary to sustain physical life. This means hydrology, geology, and civil engineering are great career choices, though they may not pay well if you're not with a corporation.

The Undercity

The Undercity, while periodically flooded out in the mundane world, is open for business year-round in the Dreaming. There's a goblin market.
http://www.timesfreepress.com/news/local/story/2015/apr/08/underground-chattanooga-documentary-released-watch-it-here-now/297610/