I'm a bit directionless on this issue as well. Uber seems to be straddling the median on this one, between "bum a ride off a friend" and actual taxi service. I'd lean towards taxi though, just because money is involved. And it really isn't fare that Uber drivers skip all the red light bureaucracy that real taxis companies/drivers have to go through, which I assume are costly. Only serves to rubber it in.
Those regulations serve a purpose, not only with the safety of the driver, but liability as well. Uber has tread lightly on this, at least in my opinion. The cases of rape in India seemed to have been muffled, and with a simple rating system how can Uber catch people who will abuse the service beforehand?
Now that I think about it, I think I side with the taxis on this one. It's a two way street, and Uber needs to shoulder the same burden of regulation other taxis do. Fender-bending the rules to their own liking by keeping their actual global-position vague is just asking for trouble, and runs-over the laws put in place. I mean, there is a reason for those laws right, they weren't hatched out of nowhere? If this continues down the same road as it is, I think the chance it will explode in Uber's face will increase, as someone is going to abuse it and the public will feel threatened. By not accepting regulation now, Uber is going to get scrapped in the future.