Uber are not a taxi company. Technology has changed the nature of the ball game. Suing Uber will not make any difference to that. In fact, it is not enough to sue Uber. They would also have to sue all the copycat platforms that mimic Uber and exploit the same opportunity. The taxi regulations, and the taxi companies living off these regulations, are toast. It would be like the newspapers suing television for eating their lunch. As soon as the technology exists, you cannot sue it out of existence. The genie will not go back into the bottle.