True, but I think that's thinking too small. In a autonomous car world why would everyone have their own? The car could drive itself home after driving you to work to take other people where they need to go, but that is still thinking too small - thinking within the current system.

In a world with autonomous cars I think a subscription service for car ownership makes more sense. A parked car is a wasted resource, autonomous cars could have uptimes similar to airplanes. Of course this isn't even including the advantages an autonomous fleet would have with fuel efficiency and traffic handling.