Airbnb was valued at $31bn after its last round. As of market close today, that's about more than the market caps of Hilton & Intercontinental combined.
Despite what the astroturfing campaigns of Airbnb et al would have you believe, regulations are meant to, in part, protect competition. If we're unsatisfied with them, we ought to use elections to change them. But allowing private firms to engage in Uber's brand of regulatory arbitrage severely undermines gov't institutions.