We did get flying cars. They are called helicopters. Impractical except for niche applications.

Look at the mofos you see only dealing with driving in straight lines on the ground and tell me you want them flying. Like a week ago I made the foolish mistake of honking (one honk) someone who cut me off and they got behind me just so they could rage honk and tailgate me for a solid minute. You want that guy with access to the ability to drop stuff from above?