Public transit is a system. Uber will never put the subway out of business, but an Uber bus or other uber services could well nip at peripheral bus lines and make them uneconomic to operate.<p>This ultimately results in less feeder traffic for the subway, higher subsidy requirements and is overall a bad thing for the system.<p>Über&#x27;s valuation is all about the market clout they are building. The fantasies of robot cabs are just a veneer.