The mass adoption of flying vehicles for every day transport seems extremely far fetched. The energy inefficiency of everybody flying in an urban environment is staggering, for one thing. Another is noise. Yet another strike against flying "cars" would be safety. The only advantage I can think of is less need for roads.

In a nutshell, the whole idea of flying cars smacks of retro scifi. It's a pretty stupid thing to invest any money in. Startups have been tinkering with prototypes of flying cars for decades and none have gained any traction. The reasons for that have little to do with the technology of the flying cars themselves but the unworkability of the concept in itself given that there already is a vast road network and no infrastructure for flying cars at all.

However, I can imagine drones delivering packages to gain some limited success as a concept in sparsely populated areas where sending a van to deliver a few packages would be unnecessarily expensive and where there is space and computer-controlled drones flying would be less of a nuisance and a hazard.