I am of the same mind on this I can't see it happening in or around any cities the risks are far too high and at present all aircraft are banned from flying low over our cities for very good reasons.
We saw and photographed this Dutch petrol exhibit at FOS which has actually flown (not at Goodwood), it is pusher prop driven with folding blades and my first thought was far too many moving parts to be reliable it just looked a mess to me, but a brave effort.
Pal - v