In my last blog post, I discussed drive-by-wire in a car. Essentially, the mechanical linkage between you and the steering wheel clutched in your white-knuckled fists is going away-replaced by sensors on the steering wheel that tell an actuator motor which way, how hard, and how far to turn the car's wheels based on how far and how hard you are turning the steering wheel. Let's turn the concept inside out now. Suppose instead of wheels, a machine was holding surgical needle and thread. Or a camera. Or a scalpel. Or a stent.