There really is not going to be a need for an individual to own a Google car. You will have an app on your phone that you will schedule a car for when you leave, and if you know when you are leaving, schedule that as well. Otherwise, when you have a better idea to return home or go to the next place, you then schedule that with your app. No maintenance to be involved in, no insurance to carry on it. There won't even be a need for parking, no need to even worry about handicapped parking, you will be left off at the place you indicate (and perhaps busy places will have to be modified for having people just dropped off at the door instead of walking through the parking lot), and it will go off and pick up it's next fare, or decide to go back to the garage to be cleaned/maintained/fueled. It will be the Uber/Lyft/cab company nightmare, because no drivers will be involved, just companies with their fleets of autodriving cars. The average individual will not own a car anymore, except perhaps for far rural areas where it would be impractical to be running a fleet of autodriving cars, and those that need a specialized vehicle like a pickup truck/towing vehicle for a trailer.
A selfdriving car changes the paradigm, at least for a large swath of Americans. It also won't change for some, either.