Not doomed to fail. Just doomed to not deliver what you're asking for, true car-free living.
I moved to the nicest part of my city and drive twice a week, on weekends. When I go into the office, I walk. A neighborhood like this with cars evicted to the periphery would be miles better than this. It's already possible to commute without a car. You just have to plan your life around it. Which you're already in for if you're considering moving to a planned community like this.
Going completely car-free is always going to a tough thing to ask for for a country as spread out as the U.S..
I expect in the next 20 years we'll start getting streets back into urban centers to replace the stroads*.
Not only for the US, I live in a car free zone in Europe. Residents are allowed to drive there, but you wouldn't notice that. It is nice and quiet, but it didn't reduce overall cars owned in the slightest. You cannot even see a change in the statistic when the policy was introduced, it is still a steady and slow growth, traffic has just shifted a little bit outside.
I own a car and while I don't use it to go to work (1km distance), I wouldn't want to miss it. The urban center is also car free aside from buses and taxi. Still, cars are extremely practical, there is just no denying it and I doubt we will go back from individual traffic any time soon.
Also doomed not to be a real community. The only gathering points will be overpriced regional chains like Firecreek Coffee. I don't see people walking to visit their neighbors at their homes very often. It seems destined to be similar to any large condo.
I moved to the nicest part of my city and drive twice a week, on weekends. When I go into the office, I walk. A neighborhood like this with cars evicted to the periphery would be miles better than this. It's already possible to commute without a car. You just have to plan your life around it. Which you're already in for if you're considering moving to a planned community like this.
Going completely car-free is always going to a tough thing to ask for for a country as spread out as the U.S..
I expect in the next 20 years we'll start getting streets back into urban centers to replace the stroads*.
* https://www.youtube.com/watch?v=ORzNZUeUHAM