Silly Uber. Mechanical safety and weather issues make this idea a huge challenge. Add in the extreme noise and wind generation, it's a long ways off. If using the word TAXI is Uber's attempt to hint that this is some sort of flying car, Elon's got it covered. He's reminded people that it's already been invented and it's called a helicopter. Also, Bezo's PR drone debut was on 60 Minutes years ago and they have yet to materialize in any significant form. Like his rocket company, there is potential, but with him it'll take years. Blue Origin is older than SpaceX and they still haven't reached earth orbit.