Monopolies by themselves aren't illegal. It's what you do with the monopoly that can get you into trouble. That said - there's no way for Uber to end up with a

Monopolies by themselves aren't illegal. It's what you do with the monopoly that can get you into trouble. That said - there's no way for Uber to end up with a monopoly in this space. But if they did, they'd likely end up getting regulated like traditional taxi services.