This was bound to happen, just a matter of time. Uber and Lyft are able to operate at much lower costs, and additionally have basically an unlimited supply of capital (VC investment). Traditional businesses have no chance of being competitive in this market.
What makes U&L lower cost? Just the lack of driver health insurance and benefits?
* More efficient (less down-time driving around)
* People use their own cars (no need to buy/maintain taxis)
* Less overhead (no need for managers, dispatchers, etc)
* No taxi medallions
* More popular, so more rides
* Subsidized by VC money (Okay, kinda snarky, but legitimate)
The last point about subsidization sounds bad, but their goal is (likely) to just get enough market share that they've already won by the time self-driving cars come out (and can cut costs significantly then).