Automatic pilot for a flying drone from A to B is much easier than one that moves on streets or sidewalks, but I hope we don't let these flying drones cover our cities with noise. If automatic cars work out, maybe a system of quiet, electric trucks that stop at your house/apartment and then a flying drone from truck to the front/back porch (or open widow? That would be cool for condos/apts) would not add much more noise to the urban environment.