It reminds me of the Ultimate technique invented 10 years ago (2001), maybe they use a similar technology :

It's nice to see holograms of such a quality used with computer-generated content. Holograms are really a great thing, better than stereoscopy for still images in some regards since they inherently don't suffer from problems like the vergence-accommodation conflict, multiple viewers and observers movement.
But apart from the animation problem which has seen some progress recently (but only at 2im/s for now) they'll have to address the very limited depth range before being able to be used for movies or video games.