Uber is already dramatically more expensive in NYC. It's to the point where, most of the time, it is smarter/faster/better to take a taxi, if you're paying attention. Most people still look at Uber first (if only because of muscle memory), but multiple times in the last few months I've watched someone do it and recoil from the sticker shock. Just this weekend, someone I knew was quoted $130 to get from Cobble Hill to the UES. Even if you're almost completely price-insensitive, that's a trip that can be made in 45 minutes (~about the same as driving) for $3 in subway fare.

I don't know what's going on with Uber in the rest of the world, but here, there can't possibly be any more margin to consume.