These things are useless without frequent landing spots, even if we develop a safe tech many cities are completely unequipped to deal with this sort of traffic.<p>The ideal landing for such machine is a flat surface at around 200ft in the air.<p>Not too tall skyscrapers where wind becomes a factor when trying to land and not too low that you are facing turbolence among buildings.<p>In one word you'd need the type of building that Sao Paulo has and a platform on top of it, and in fact helicopter traffic is very intense there, because necessity is the mother of invention. Tokyo somewhat too but much less so.<p>Maybe, just maybe NYC and Chicago could be adapted but there are too many super high buildings and a very popular law not to fly helicopters over Manhattan.<p>London, Rome, Paris, Madrid, Tel Aviv, Jerusalem forget about it, you'd need a complete overhaul of the skyline.