While 'holography' is indeed often misused, this is one of the rare cases in which it is not. I have been to lectures by some of the people involved in these co

While 'holography' is indeed often misused, this is one of the rare cases in which it is not. I have been to lectures by some of the people involved in these companies and this technology in which they've explained that the projector contains a spatial light modulator that is used to diffract the light from three lasers, one for each RGB channel. While this has the benefit that the image is in focus irrespective of how near or far the screen is, there are obviously some problems with noise. However, there is a simple solution to this problem: just calculate multiple SLM patterns for each frame, each of which has different noise, and display them rapidly so that the eye averages out the noise.