Except that is how capitalism works time and time again. Companies will lower prices to gain market share then once they have a large control of the market will happily raise prices and keep any gains in productivity for themselves. The only reason Uber is trying to undercut people right now is because the industry is new and they want to try and capture the market for themselves. Once they do or some situation forms like what we have with internet with Comcast and other providers avoiding competing you can expect prices to not ever be lowered again. If anything this is another reason why I favor public transit over self driving cars because public transit investment is owned by the government and therefore the people, it’s not gonna try and milk people for profit. Whereas these ride share companies already have shown they’re willing to act shitty towards their drivers to drive up their own profits, I imagine these companies would continue to find ways to milk more profit out of the service with self driving cars and with drivers being gone that’s gonna come at the expense of the users.