Just because self driving cars are a game changer doesn't mean that all (or even any) of the benefit accrues to Uber. Who holds pricing power in this scenario? The company that makes the car, the person who owns the car, the agent (Uber/Lyft/etc.), or the rider? I think there's a reasonable case to be made that the agents are the most commodity-like element. Tesla e.g. has already shown a desire to use value-based pricing to capture their share of the money-making potential of the cars they sell. Any owner will prefer to rent their car via the agent that pays them the most. Any rider will prefer to rent it through the agent that charges the least.