Funny thing, I had someone from CAANZ telling me this sort of thing was going to happen in the near future. There are a couple of companies already trialling these machines in New Zealand. I told him it wouldn't be in either of our life times.
I don't see these machines being much cheaper if any to buy and operate than a helicopter of similar load carrying capacity. If there was a business case for this there'd be a number of businesses already doing something very similar using helicopters. There isn't, so I don't see these Air Taxis as the next big thing.
Further I don't see the general population being all that enthusiastic about all these thing whizzing around overhead, they won't exactly be quiet.