Actually not a terrible idea as far as inventions go. Seriously, just hear me out. First off, you have to wonder what exactly would convince a man to allow another man to be that close to his neck with a razor. One slip up, and that’s it. A robotic arm could be fine tuned to make only the smallest movements, and even to not move at all if the operator jerks too suddenly. In fact, they are being used today, but for robotic surgery, for precisely that reason. The only thing holding this back is that no real barber would have hoped to afford it.