Having spent far too much time driving around in San Francisco in cars, 18-wheelers, 10-wheelers, and other contraptions, I think the self-driving car is the perfect thing. This way, when some naked dude in a cowboy hat comes walking toward you in the middle of the street at five in the morning, you can just close your eyes and imagine you were somewhere else. There will still of course be the problem of liability for when the computer system burps . . . you can't sue a computer.