I think if artificial intelligence of cars will expand and will get more "clever" in the near future, flysing cars are possible, but I guess it would consume more energy than a wheeled car, but for example, we wouldn't need bridges and roads, which would save a lot of money for all the world, so I guess a flying car is a good idea to save resources, but it needs to fully work depending on AI to control the traffic..
It's much more easier to control air traffic for AI models than making a car with wheels drive on it's own, due to different road signs..
But flying cars as seen on different sci-fi movies flying between houses are quite stupid, or are those houses very tall? because you could just fly above, but whenever you want to land or something like that you would need to land without creating any accident.
Also flying cars are much better because there won't be much traffic like Today, for example, you can fly in 5 different air levels and if everything would be done by a computer, you just would need to sit and enjoy the view? Or maybe those cars would be flying very fast you couldn't really see to much