I think Uber will be disrupted/destroyed by something more driver friendly. They offer nothing that will keep a contractor loyal. All it would take is another 'app' that offers more autonomy and a larger share of the profits. Uber's 25% (is this correct?) take for a software infrastructure and brand is outrageous and probably causes a lot of resentment among drivers.

Of course, we are talking about self-driving cars here so I'll just shut up. :D