Re: Flying cars? Pft.
This reminds me of experiences I had years ago, training to fly hang-gliders. The group I was with were doing short flights off a valley side in the Dales. The wind was slowly getting stronger, had been all day. When my second turn came round, I did the usual "run like hell downhill" launch, but instead of the expected pull away from the ground, nothing happened.
What had occurred was that the wind speed had gotten strong enough that instead of laminar flow over the opposing valley lip, down to the bottom and back up again, we were now getting break-away rotors of wind peeling off the opposite valley lip. These turned the wind from a strong uphill flow to gusts and occasional dead air.
Visually, everything looked the same. Neither I nor any trainee had any clue that this might happen (although I reckon the trainers had it in their minds to watch out for). Now, imagine you have a random non-pilot in a computer-controlled aircraft, which at some point performs an emergency landing in a field somewhere.
The cause: a thunderstorm visible on radar, not so visible to human eyes. A danger of downwards microbursts, hail and strong winds, so the aircraft HAS to land somewhere to avoid the danger.
Imagine now that you're the poor helldesk techie on the other end of the phoneline as our unclued, over-paid businessman rants down the phone at the hapless operator about missed meetings, broken contracts and the like. Hell on earth as the moron customer is certainly not going to listen to sense, yet if the danger factor were ignored then his surviving relatives would certainly sue.
Similarly the customer whose flight gets stopped or diverted because of a NOTAM for Purple Airspace over where he wants to go. Insta-rant over delays, which is much better than a short, painful visit from the RAF for endangering the life of a royal.
This alone is going to prevent the widespread take-up of flying cars.