I think you'll be surprised at how quickly this type of thing is evolving. Google is putting an immense effort into solving this problem. I don't see self-drive cars as a solution for rural areas, but I do see a massive demand for cars in a city, replacing taxis and car clubs.

I can even see it being a sort of a 'mini-bus service', for example, noting that you and 4 others are doing a pickup in an area and doing a school drop off, offering to split the cost of the journey.

The point is that individual car ownership doesn't really 'work' in a city too well.

Getting to the point where this is socially acceptable shouldn't take too long. The reduction in cost base and the fact you can sit in the car and work/play should make it very attractive.