They say it's not a parlor trick, but it's nowhere near true holography or anything like it. True holography records the object's wavefront as a flat interference pattern, encoding the phase information from the object (and also creating a very precise model of its surface), creating a diffraction grating which can then be used to replay the identical wave when illuminated by a suitable reference source of light.<p>This is the only known way to create true images with real depth of field and parallax, and requires ultra high resolution to both record and display the microscopic interference pattern.<p>There is a good book <a href="https://www.crcpress.com/Ultra-Realistic-Imaging-Advanced-Techniques-in-Analogue-and-Digital-Colour/Bjelkhagen-Brotherton-Ratcliffe/p/book/9781439827994" rel="nofollow">https://www.crcpress.com/Ultra-Realistic-Imaging-Advanced-Te...</a> that has the mathematical basis for which the real principle of holography could be applied, given a capable enough display technology, to re-create an exact replica of the light field/wavefront that is identical to what we see in real life. Of course, a single static image with sufficient resolution of about 3"x5" in real life contains over 100 GB of data. The information carrying capacity of light is amazing.<p>None of the current VR/AR systems (including MagicLeap) use anything close to what is required, and we are still ways off in both display tech and GPU bandwidth to even generate a single, static image in a consumer product.