Don't compare an R22 with this concept. Autonomous drones will have 4 to 12 electric motors. Incredibly simple and fault tolerant. Ballistic parachute most likely.
I'm not I'm comparing them to multi turbine engine ones.
The whole 'disruption' mantra is just an excuse to flaunt the rules. If one of these electric things got airborne in your urban heliport and had a EFATO and went straight down it would be a huge public safety issue.