First it was self-driving cars, which are still far from finished and now it's flying cars. The first reason flying cars are nonsense is that they aren't flying cars at all. The second reason flying cars are nonsense is that the birds will never allow it. A recent survey by the University of Michigan's Transportation Research Institute found that Americans are concerned with the safety of flying cars. Those flying cars you keep citing from The Fifth Element and other science fiction movies, forget it.

Source: Forbes April 25, 2017 13:31 UTC