> There is a strong monetary incentive to make sure every car has a high utilization time

Not based on real utilization of cars today (5% utilization, 95% parked)

There is a stronger monetary incentive to sell at least one car to every single person :)

> Restore millions of sqft in parking spaces to be reclaimed for parks and housing.

That was also my hope. I don't think it'll happen. People will use autonomous cars like they use uber/lyft/taxis but they will still have their personal cars... Those will need the same amount of parking, or more given electrification and long charge times.