As others have already noted, uber is not about replacing human drivers with human drivers, but about going driverless.

To me a more interesting question is the whole sharing economy and it's relation to traditional regulation.

Restaurants, hotels, taxies, etc have long been heavily regulated to ensure that so you don't get salmonellosis, don't have to deal with cockroaches or die in a car crash because of an incompetent driver.

As the whole "sharing economy thing" is about information - the question is - can better movement of information replace the need for traditional government regulation in those fields (in the form of ratings, web of trust, etc)?