Earlier quoted context omitted.
That would be incredibly wasteful. Double the cost of gas, double the environmental damage, much worse traffic because cars are going home by themselves with no passenger, then returning to get the passenger later.
Not really. In a future of self-driving cars most people won't even own their own car so most of these cars will be shared - essentially automated taxis. So after the car drops you off it will go to its next call or park somewhere until someone calls it.
How is the car going to park itself? The grandparent's point was about how annoying trying to find a parking space is.
Can self-driving cars parallel park yet?
Can they detect a strip where parking is only allowed between 9-4 and it's 4:30? Can they detect fire lanes?
EDIT:
Also, are these automated taxis really going to be more affordable than owning your own car? Taxis are incredibly expensive today. Sure you save a lot of money when you don't have to pay a driver, but is it really enough to make car ownership undesirable?