You say this from any special knowledge or is it just your opinion from the video? Looks to me like it will go through your flesh and bone like they're not there, in a way even a razor sharp knife won't.

Also, while it's true that dull knives are in some ways more dangerous than properly maintained ones, that doesn't mean safety increases monotonically with sharpness. I sharpen my kitchen knives every weekend and I'm perfectly capable of achieving an edge I could comfortably shave with, but I deliberately don't (I skip the highest-grit step and leather stropping needed for that) because it's not optimal for the vast majority of cooking tasks. The only thing that happens regularly in my kitchen that needs razor sharpness is scoring the top of a sourdough loaf, and my wife uses actual razor blades for that.

This strikes me as more of a competitor to electric carving knives than something I'd want to replace a standard chef's knife with. It looks like it needs to be used with very great care.

Medical bone cutting knives are ultrasonic. I assume this one has a duller edge than those though.