I'm pretty sure personal flying cars can never go mainstream. Except for airshows, aircrafts have to fly hundreds of feet apart from each other and 1000 feet above cities, just to keep everyone safe. Flying involve changing winds, a 3rd dimension, and engine failure procedures. Those are not for everyone.
Here's a 3-4 min video of that Lilium jet.
Sorry I meant to say autonomous flying cars, controlled by a central skynet. What could go wrong?
If you not already seen this, it's a good one... Turn up the sound! And full screen!
it is mesmerizing. There’s a similar video tracking the Challenger crew cabin but not so mesmerizing.