These guys removed a cyst from a patient's arm, a procedure you could do in an ER (not an OR) in 5 minutes or less. I guess they proved you can do that in zero-g, but so what? I could have told you that would be possible in zero-g. But what about some MAJOR surgery where you've got a lot of bleeding into the operative field? Normally, here on Earth, we suction up that stuff. In zero-g, it would be all over the place.
Maybe major surgery is possible in space, but this showboating "experiment" does not prove anything we couldn't have already figured out. 😡