Uber Plans Flying Cars in 3 Years

The ride-sharing service Uber has announced plans to test flying cars in 3 years time:

http://www.bbc.com/news/business-39715061


There are already some companies which are unveiling their models of flying car, which are basically  small Vertical TakeOff and Landing (VTOL) aerial vehicles:




If such "air taxis" were to become more common, then perhaps running them all under a single common Uber-style service would be useful, in order to better coordinate and keep track of all such vehicles in the air, to minimize chaos and maximize collision-avoidance.