If "self-driving car" just means "I'll drive for you, most of the time, while you sit behind the wheel", then we are talking about nothing more than a better automobile. Of course that will sell, but in that case the world of the future looks pretty much the same as the world of today, with fewer crashes.

But people keep talking about "self-driving car" as though it is going to be a robot capable of running errands on its own, with no human driver and not even necessarily any human passenger. The question is still open: can this be done well enough, enough of the time, solving a valuable enough class of problems, that producing such car-shaped robots will actually become a significant industry? Furthermore, will the problems solved by such hypothetical car-shaped robots be significant and widespread enough to justify the hype currently being lavished on them?