Things aren't so black and white - and the market is different in different parts of the world, for better or worse.
I've been living in Indonesia (I'm an American citizen) for the past year and GO-Jek is the big runner here. It's huge, all of my friends use it, and it's damn well the most convenient thing I've used in a while - and it offers even more than Uber: Motorbike rides, car rides, cleaning services, massages, food delivery, item shipment, etc. It definitely has some kinks - but it's growing, and fast.
Now Uber came in last year and I've watched it's growth - they're subsidizing drivers by 50%; what would cost me normally $20 from a taxi driver on the street costs me $8-10 with Uber, and the drivers get paid the same. But there are also issues they have to deal with - such as restricted zones for pickups.
The idea as a whole is here to stay; it will be improved on continuously, features will be added and removed, run-ins with governments and failed investments will be a part of the process - but peer-to-peer transportation and delivery will increase 10-fold.