Now imagine the consequences to people's travel decisions when you can do this for any two locations within, say, 500 miles of each other, because you can sleep in your self-driving car while it takes you there. Not just locations linked by train.

Wilderness areas, second homes, minor tourist destinations of all kinds. It has the potential to totally change the economies and usage patterns of those areas.

I live somewhere that's just far enough from the major east coast population centers to keep weekend traffic down. But when sleeping in a self driving car is a reality? We're talking 100 million people who can spend a weekend here easily. It's going to change everything.