Reminds me of the original concept of EPCOT. Not the theme park, but the Experimental Prototype Community of Tomorrow. Walt Disney's design for the City of the Future (TM).
(http://upload.wikimedia.org/wikipedia/commons/0/01/EPCOT-model.jpg)
The basic city was arranged like a spoked wheel, with the downtown and commercial center forming the big, dense center of skyscrapers. Vehicles are banned, with exclusively foot traffic. The main roads for cars and supply trucks run underneath the city (presumably the same way the Utilidors under the Magic Kingdom were built, with the theme park sitting on a 20 or 30 foot tall dirt mound with the tunnels at actual ground level), with all supplies delivered discreetly through the tunnels and brought up to the surface from the storerooms. Most of the housing for the planned 20,000 citizens would be apartments on the outer rim of this center.
After that was the "green belt" of parks, community centers, and churches. On the opposite side of this belt would be low-density residential areas designed like flower petals: a vast green area with light recreation spots and playgrounds (and paths for electric carts) with the houses along the outer rim. The PeopleMover (a sort of light rail system involving motors in the tracks moving the mostly inert vehicles) would be used to get to work from the homes; cars would only be used for trips out of the city.
Nobody owns land or has anything like municipal voting rights; both houses and apartments are rented and all residents are required to have a job to remain living in the city. As new technology is developed, workers would enter the homes during the working hours and add new appliances or different ideas for housing to use them as a test bed.
Along with the commercial and residential areas, there would be the EPCOT Industrial Park where major corporations would rent out space to work on technological developments that would be tested around the city. Guests would have the chance of touring the labs and factories, with Walt hoping that they would encourage similar technological growth back home.
There's some other details. It would be connected to the Magic Kingdom and an independent airport via one long monorail track running north to south. There's a 30 story hotel in the center of the city, favoring multiculturalism and incorporating areas with shops and restaurants themed to different countries and regions. Disney hosts and hostesses would also be multicultural, so someone would always be available to speak to guests in their native language.
Nobody really knows how it would have succeeded, since Disney died before anything beyond land purchases could be made. Walt Disney World does incorporate a lot of his ideas, though: the Reedy Creek Improvement District owns the land with enough independence to decide on land use without the cities of Kissimmee or Orlando mucking about. The whole area they control is almost 40 square miles and has independent utilities, a fire department, etc. They even have enough power to build a nuclear power plant in Walt Disney World should they so desire (which they don't at the moment). The monorail is a practical transportation system around the Magic Kingdom and adjoining hotels, and Epcot got a lot of inspiration from the multicultural aspect (every land is staffed almost exclusively by natives, so the France pavilion is staffed by the French). The underground tunnels were incorporated into the Magic Kingdom, as well as the generally "behind the scenes" nature of any work or deliveries done in the parks and resorts.
There's also the town of Celebration just on the border of WDW, which is owned by Disney but replaces the futurism concept with "new urbanism". Small town with short commuting distances (so there's a lot of electric vehicles and Smart Cars), state of the art hospital, etc. Someone once compared it to the town from The Stepford Wives, in that it's TOO perfect.