The robotic platform heaves, as if breathing. Atop it stretches a piece of white gauze with a blue line painted down the middle. Along this line another robot snips with little surgical scissors, waiting for the platform to come to a brief rest before making a cut. And another snip, and rest. And another, and rest, on down the line. This could be you one day. Not that you’ll turn into a robot—you may go under the knife of a machine working as a surgical assistant.