Normally, I see the neat factor in such innovations. But I became pessimistic the more I looked this over. I'm not seeing the practical application.
I can't help but think of the transit buses with hydraulic ramps. For disabled passengers to use. City buses are under constant maintenance to keep such things in steady operation. With buses being replaced mid-route should a ramp refuse to open or close at a bus stop.
Should a flying car - such as this design - become common, I have this vision of one-winged cars hogging the street when their wing hydraulic is in disrepair. And since they are personal vehicles, it will be a fight to regulate them. Will we have flying tow-trucks or helicopters to get the disabled car off the road?