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The robot here is absolutely not replacing a surgeon. To quote from the piece:
the robot, currently in prototype form, is a low-latency remote surgery device in which the surgeon uses a pair of squeeze-sensitive, pen-like controllers and watches the real-life effects through a tiny, stereoscopic 4K 3D camera system. This feeds real-time vision through to a pair of OLED screens in what effectively amounts to a strapless, desk-mounted set of VR goggles that the surgeon rests their face in.
It simply is a way to allow a surgeon to operate on a scale that was previously too small, and to do so without being as invasive as current methods.