Uber was actually a little too early into the game. They are going to have legacy issues transitioning into self-driving taxis. The whole end-game with this is to have self-driving cars and get rid of drivers, this was the stated goal at least 4 years ago.

This is where Tesla is going to have an advantage. They're going to start with self-driving, no need to deal with pissed off drivers and other problems that come with a transition. Same thing with their dealerships - they didn't have to deal with the dealer-franchise system.