Fascinating video of a HoloLens being used in a real back surgery – presumably the video was mostly shot using Spectatorview or something similar. I have seen other systems where mocap type technology is used to get more precision in the pose of the HoloLens but this system doesn’t seem to do that. Not that I am a surgeon but I doubt that the HoloLens can replace the usual fluoroscope since that gives real time feedback on the location of things like needles with respect to the body (yes, I have been on the literal sharp end of this!). However, if the spatial stability of the hologram is good enough, I am sure that it greatly helps with visualization.
As one of the many people with dodgy backs, I am always interested in anything that can improve outcomes and minimize risk and side-effects. If the HoloLens can do that – brilliant!