Some of San Francisco's robot-run restaurants are failing. It could simply be that we still want to be served by humans, not machines.

The robot revolution in San Francisco has begun. Or has it? The tech-centric city has seen an automized restaurant scene in recent years. The idea is that robots could be used to fill repetition-heavy positions that require hours of nonstop work — like line cooking — that could then free up human employees to provide higher quality customer service. Labor costs and, subsequently, menu prices would be lowered, tipping would become obsolete, restaurants could more heavily invest in higher quality ingredients, and profits would increase for business owners in the process — or at least that's the theory.

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