[tptacek]

The deal Chicago has with taxi cabs is that street hails are reserved for regulated medallion taxi cabs; in exchange for that, the medallion owners are required to maintain vehicles, insurance, and coverage areas, and are required to comply with the billing procedures set up by Chicago.

Uber currently uses Chicago tax company drivers directly, but doesn't comply with the regulations the medallion owners are required to comply with --- for instance, Uber adds 20% to the fares, which is something cab companies can't do. Uber's defense for this is that using an iPhone to get a cab isn't a "street hail"; the cab companies argue that they're equivalent. We'll see who wins.