Peloton hasn't really solved any social problem. The bike works just as well for burning calories as any other, what they managed to accomplish is sell people licenses for something they used to own at twice the price with a subscription on top and make them feel good about themselves instead of feeling like they're being robbed. That's the real innovation.
Uber hasn't solved any material transportation problem either. We're not suddenly able to 10x our urban transport capacity because of it. Probably the opposite, if anything it's induced congestion and draws resources from the modes of transport that actually solve those problems. The innovation here is that it's managed to do this while pretending not to be an employer.