This only works in well connected/urban areas though.
Waiting for 15 minutes or longer whenever you need to get somewhere is not acceptable for a lot of people. Also, cars act as mobile lockers for your stuff. Etc.
Autonomous taxi's will supplement the car owner model, but that model in and of itself is not going anywhere.
Don't underestimate the aversion people have for "public" transport, many people I know bend over backwards to not use a shared form of transportation.
Solar powered cars are only working well in Urban areas, and they don't make economic sense, they're simply a form of guilt-free conspicuous consumption.
There will definitely be people who need their own vehicles, but typical families (and typical families live in urban or suburban areas) won't.
