It's not a disruption, it's a mutation
Lyft has announced a partnership with General Motors that, along with putting half a billion dollars in the war chest, will help Lyft create rental centers for drivers without cars to drive for the platform.
Uber and Lyft are not disruptive technologies, but disruptive economies
While Lyft and Uber like to claim that they are disruptive technologies, they have functionally done little more than that existed in the first place. Instead, they are disruptive economies in that the transaction and costs have been shifted.
Where taxi companies own fleets of cars with medallions that permit them to operate. The new paradigm shifts to what are essentially the duopoly of Lyft and Uber. They don't need badges. The brand IS the badge. If you're not on those platforms, you can't pick up a passenger.
It's all still passengers spontaneously hailing cars. They've merely shifted the way money is handled and how the price is assessed. The number one killer reason "ridesharing" is popular(for now, at least) is because it's markedly cheaper than the existing alternative.
If they were truly disruptive, we would see a better distribution of rideshare drivers outside of peak times, the ambiguity of rating drivers would be made clear, and the relationship between the two parties would be closer, rather than disintermediated by an app replacing the plexiglass pane between driver and passenger.