I think Uber and Lyft and the established industry will start gearing up for a war for your transportation needs. If the Auto industry is smart and has learned something (which I really still need to be convinced of), they will start/are working on such a shared use fleet model because one way or another, in the future no one is going to own their own car. it's simply far too inefficient if the vehicle can drive itself. Why would you want a vehicle that sits idle 90% of the day?