Every person I know, young to old use airbnb now. I can't say the same for uber. Plus, as mentioned in a comment, although it would be have a higher market cap than Hilton, Hyatt, etc. They also have no inventory, employees, property tax, and so on.

I see this valuation being low in a few years. Instead, of thinking of them as a hotel chain (or something similar), we should think of then as an insurance and travel company