So you have to constantly move your head to have some 3D illusion, otherwise if you not moving your head it's just plain 2D. It would be more interesting to combine with stereoscopic 3D, but even with this we are still far from real 3D. The next interesting thing will be real hologram displays using rewritable holograms: http://www.youtube.com/watch?v=b84RBl-jgZM