Aside from the gesture based UI interaction, what software shown in this video has actually come out working like it does in the video? None. Some developers might have managed to bolt these interaction methods on a (shovelware) game here and there, with 95% of them being complete garbage because of the inherent flaws in the Kinect hardware. You simply can't say with a straight face that Kinect delivered on it's initial promises and vision.
And guess what, when press got their hands on Kinect for the first time they were mostly raving as well.
Same with the original Surface table, we were all supposed to be paying for our drinks by just swiping on the counter and watching family photo's on the living room table while smiling right about now. Even with the tech being really cool and tech blogs blowing up, it went nowhere. The promo vids sold us a vision that failed to find real-world traction in any way.
All i'm saying is that the final HoloLens product will most likely not meet most of the lofty criteria you all have in your head right now. Microsoft has become incredibly skilled in making concept/pitch videos like these, making the consumers feel like full immersive flawless AR is just around the corner even when it simply is not.
I agree that the 'vision' of this device sounds fucking amazing, and if they do knock it out of the park i'm in line for one at release day.
But based on the past, I feel a significant dose of scepticism is in order at this point.