Well, sure, but The Villages doesn't have all vehicles restricted to an underground roadway supply system grid built out under an entire city, pedestrian PeopleMovers for an entire city, a downtown completely enclosed in a climate-controlled dome, the legal issues that come with changing peoples' furnishings out from under them or trying to evict anyone unemployed, etc etc. There's a huge difference between 'planned community' and the kind of absurd stuff that Walt wanted to build that would all need to work perfectly before anyone could even move in for the first time.

The residents in EPCOT would have been renters, so the ideas of evicting for nonpayment, or the landlord doing remodeling and upgrades, seem pretty banal.

Separating vehicle form foot traffic is a strong feature of modern urbanism and even the buried road network doesn't seem prohibitive, if done on greenfield. But it is a rigid concept, that would expose you to immense costs down the line, as the city grows and tries to adapt to changing reality.