The problem with that is the additional friction. If I could rent a car and it arrived in front of my house, no need to own. But if the nearest car sharing st

The problem with that is the additional friction. If I could rent a car and it arrived in front of my house, no need to own. But if the nearest car sharing station is 15 minutes away, that just added 30 minutes to every car trip, on top of the friction that comes with such systems. That's where self-driving cars may be able to make a huge difference.