But the technology for "flying cars" never arrived. It would be totally economically unfeasible to have mass market flying cars (helicopters, I guess?) today.

But the technology for "flying cars" never arrived. It would be totally economically unfeasible to have mass market flying cars (helicopters, I guess?) today. On the other hand, even you admit that "self-driving" tech is already being deployed one way or another. So I don't think they're particularly comparable.