The problem with an air ambulance idea is you need to make it big enough to work on a patient and it needs to be big enough to hold enough battery to have enough range. You could maybe have one big enough for working on the patient, but with a shorter range, with the only advantage over a helicopter being a smaller area needed to land.

I think it will be a Segway of the air, meaning only “rich” douchbags and sightseeing companies use them in America until enough people die. Opulent presenting countries will use them for headlines like Dubai and SE Asian countries will have them for the police tactical units.