When I see the innovative ideas for flying cars, and think of the present regulatory standards for certified aircraft, FAR Part 23.143 comes to mind (my bold):
Sec. 23.143
General.
(a) The airplane must be safely controllable and maneuverable during --
(1) Takeoff;
(2) Climb;
(3) Level flight;
(4) Dive; and
(5) Landing (power on and power off).
“Safety has been our primary driving goal in the development of this new technology,” Opener CEO Marcus Leng said. “Opener will be introducing this innovation in a controlled and responsible manner.
Okay, but if it can't safely glide to a landing, and is too low for a parachute to arrest the descent, it's not as safe as a present day certified aircraft. If society changes their expectations, and removes or alters the requirement that an aircraft be safely landable power off, that's society's choice, but at present, that capability is still a requirement for certification and certification is required for commercial operation of aircraft.