Uber is a startup that doesn't make money (actually loses quite a bit per ride), has just been rocked by a major scandal and doesn't posses any sort of tech or business process that is really unique. There is nothing that Uber does right now that another startup could just copy.
They lose money on each ride, and it's incredibly unclear how they will make money outside of trying to run taxis companies out of business by subsidizing fares with VC money and then jacking up fares when there is no more competition.