Taxi regulations exist to prevent Uber's "surge pricing" model, thereby guaranteeing the customer the same price for the same distance, no matter how late at night it is or how drunk the customer is (at least in Germany; the taxi market as a whole seems to be broken in the US so that's another story).

Hotel regulations exist to protect other tenants in a building from the kind of bullshit which has happened multiple times: ever-changing, drunk tenants demolishing stuff, being loud, throwing sex parties, etc.

The only law area being "disrupted" where the existing regulations don't protect any legitimate interests aside from MAFIAA's Big Money is the TV distribution, and I'm sad that Aereo got problems there. But well, that's the area of Big Money, no chance to compete there :(