Your next doctor will treat all the ills that come along with being human, but that doesn't mean he'll be an actual human. Robot doctors will soon be wheeling their way around hospitals, experts say. It's estimated that 4 out of 5 doctors will eventually be machines. Of course, those machines are still controlled by a human doctor; they're just making it easier for a dwindling number of physicians to meet the needs of an increasing number of patients.