One of the best, if not the best part of Uber is the payment. No tipping, no haggling, and no getting screwed, whether you are the driver of passenger. Don't need to worry about getting stiffed because it's already paid for.
Maybe with UberPool(sharing rides with other people on the same route) they'll have more access ? and if you combine that with Uber's SUV service, which enables sharing rides between up to 6 people, you'll get to something more accessible to poor people.