you could th erotically fly safely across the Grand Canyon
A spelling error I know, but for a moment there ...
The flying car without a elaborate air traffic control system would be the main problem as i see it. Having tens of millions of people in the their individual flying cars operating completely by VFR would be a horror story.
Hmm, especially if they are all competing to join the mile high club.
I think we have to learn to crawl before we learn to run, so I have no problem letting society learn to deal with flyable cars, or roadble planes first. Once we catch on we can
Its kind of like asking the horse and buggy generation to consider driving a lexus on a five lane freeway at 75 miles an hour in heavy traffic.