The auto industry itself; a family will far more easily be able to get by on a single car: "Take Little Joey and Little Suzie to work, drop dad off at the office, go pick mom up at home, then at 3:30, pick the kids up at school, drop Suzie off at soccer practice, and have dad home in time for dinner at 6."
For that matter, shared, scheduled cars on a neighbourhood scale would be pretty great.
I've made this point many times on driverless car threads. The auto industry sells cars on the basis of miles driven, not number of families. As the passenger miles will increase with driverless cars, the car makers have absolutely nothing to be concerned about, and much to be delighted about driverless cars.
For that matter, shared, scheduled cars on a neighbourhood scale would be pretty great.