Most Uber drivers I ride with have at least one other ride share app open, none of them have a loyalty to the company. In fact, many actively dislike it. And riders I talk to aren't loyal either - they'll happily flip between Lyft, Uber, and whatever else is available, depending on who is offering a discount code that week. I don't doubt that Uber has a better investment in the future (self driving cars and the like) but it remains to be seen if they'll make it that far - that future is still a ways off.
By itself that wouldn't be so drastic, but Uber has taken on a lot of funding and obstinately refused to go public. It could put pressure on other companies that are currently quite happily staying private, too.