Flying cars have been part of man's future tech fantasies for ages actually. However, even if this becomes commercially viable at some point, I'm guessing it would be another nightmare trying to coordinate traffic for vehicles that can move in 3 dimensions instead of 2 and the practical aspects of it might just be too cumbersome to manage in our lifetimes.

Battery operated sports cars (doesn't Tesla create that already) tand bikes - well they will be here sooner than you know