Yes I've seen the video, and it scares me to what lengths they will go to to lie, and fool people such as yourself. Video [1] for those who haven't seen it (skip to 2:25).

[1] https://www.youtube.com/watch?v=xgakdcEzVwg

I suspect that in the environment of a highly-controlled demo, a Kinect could appear to do most of what you see in its "teaser".

When people experience the actual FoV of the Hololens they will be disappointed, because MS has engineered the demo to appear edge-to-edge.