Uber's problem seems to be that they need to raise prices and cut driver rates once they've captured a market and driven out competition. Either that, or they need to switch to driverless cars to eliminate that component of their business - but that seems to be a ways off, and there's no reason to think other players won't be just as successful when you're able to remove drivers, one of the larger variables, from the overall equation.

https://twitter.com/neilanalien/status/627873374505562112