So many possibilities
The greatest thing is it would make drunk driving a thing of the past. Before going into the bar program the car to take you to your favorite after bar eatery followed by the trip home. No more having to pay for expensive taxis or calling a towing company to take your car home for you.
No more need to pay police to man DUI checkpoints.
What about no more soccer mom duties? Have the car take the kids to school or practices for you. Don't feel like dealing with the ex-wife after your divorced dad visitation weekend? Program the car to take the kids home for you. The possibilities are endless.
The question is would driver's licenses become obsolete?