I was initially skeptical of NYC too until someone at Uber pointed out "New Yorkers don't realize how often and how far they walk to get cabs". It's true - people forget that they'll walk a few blocks to get a cab. Uber literally comes right to your door, and people are lazy. The success of services like delivery.com and Seamless Web show that if your service involves not talking to anyone and not having to move, your chances of success are high, even in a market as crowded as New York City.