I would add that Uber has traditionally operated at a loss, and on top of that they don't provide the same level of benefits and payment to their "contractors".(whether or not they should is a different question)

While they did disrupt the taxi market, they are also setting false expectations about what sort of model is viable in the space since _Eventually_ they will need to bring in revenue or could potentially be forced to pay their drivers more which would lead to a big hike in prices and would probably have an impact on how it functions now.