I'd much rather all of the resources that are going into autonomous cars was instead going into proper public transit infrastructure. Cars are so hopelessly space and energy inefficient, and I hate driving them. If I could get around by bus, light rail, bike, and all of the wasted city space devoted to parking could be turned into more housing and amenities, that would be great. I think it would be meaningful to also…
They're great for short distance travel in densely populated areas, but outside of that I doubt they'd hold up in long-term cost and efficiency vs autonomous electric cars for long.
As for parking, a fully autonomous car service would allow a car to come to you and pick you up. So it wouldn't need to park near where you are.