Most people are lucky to drive a year without a costly mistake. Put them in the air, and their mistake (or a self-driving mistake) means death. And even if we can make personal air travel safe, how ever are we going to coordinate it? I appreciate the advances we gain from the crazy/idealistic people who invest time or money on flying car ideas, but it is just never going to happen. The earth will burn and humans will…
I would expect bots to control masses of flying cars in populated areas, not human drivers. The air is actually simpler to navigate because there's not much around besides other flying vehicles. You don't have pedestrians, potholes, fallen trees, fading lane paint, etc. (Maybe flying sharks during a sharknado, but those are relatively rare.)