"We didn't get flying cars, but the future is turning out OK so far."
Flying cars have been produced for the last twenty years. Drivable aircraft for longer than that. The problem isn't technical, it's political. They can't license and regulate them. The Government systems are just too crude.
That is not the problem. You can fly one if you have a flying license or do it at low altitudes over your own private land. The problem is that they are a stupid idea, the power spend keeping the vehicle hovering is not spend moving it which makes the range ridiculous short, on top of a price set in hundreds if not millions of dollars.