With all that said a flying machine like this will be electric and all of the above. None of this stuff is crazy anymore. Integration is key. I aware of a project and get to see it ( somewhat related to this area ) and see the challenges, this is not easy stuff to do, like Ronald Reagan said ( paraphrase here ) the simple solutions are the hardest. It will take some clever thinking and engineering to make this stuff all work.
BTW...
I've done some research on the history of Brush-less electric permanent magnet motors and Li-Ion batteries (taken out of Kodak instant cameras!) working in concert, and how they found their way into R/C aircraft, possibly way before this became the norm for Ecars and Hybrids. The R/C guys might have given us the template for future mobility land, sea and air, and were perhaps way ahead of their time....
Yes the radio control market was the seed for aviation much like the bicycle market was in 1900.
This form of aviation will be pilotless, using GPS waypoints. We have been doing this with RC drones for years. The government must determine where the Sky Lanes are and how to integrate among existing FAA airspace.
Id like to see test routes like Santa Monica city to LAX for these. Thats a 10 mile trip that often takes an hour to drive. This technology makes more sense than Musks tunnels.