Funny thing, the tech used by Microsoft Surface utilises (pixel sense http://news.softpedia.com/news/Microsoft-Surface-2-0-PixelSe...) the screen pixels as the cameras to capture the environmental data. Now, if you could combine that with the latest 3D tech they are pushing these days, the glasses free type, you could make a directional cloaking device with very little of the problems seen in the video.

The only glasses-free 3D tech I know of works by restricting the viewing angle of each of the two sets of pixels to such a small area that each eye gets a different set.

That would make the viable "invisible" view positions even more constrained than with the technique shown in the video.