Indian is relatively new market for Taxi aggregates like Uber who is trying to push US model, which certainly won't work as it is in India. The market demographics are totally different.
Any reason why it won't work in India? I've had worse problems with cabs trying to rip me off in India than in most other places and would be delighted to have a way to avoid that.
Hopefully Uber will be able to keep dodging stupid regulations. It's remarkable how well they've done so far.