The problem was computation
Shi and colleagues’ Nature paper, published on 10 March 2021, presents a neural-network pipeline for computer-generated holography from an RGB-depth image. The authors report 1,920 × 1,080 synthesis at 60 Hz on a consumer GPU. The research concerns numerical diffraction, interference and a holographic display experiment.
Those figures describe the demonstrated method under the paper’s conditions. They do not establish a purchasable room-scale display, a universally supported input format or the performance of every device marketed as a hologram. Keeping that boundary intact makes the result more useful, not less interesting.
Separate the algorithm from the apparatus
A display experience depends on more than the speed of image synthesis. Optical hardware, viewing region, illumination, content input and calibration all influence the final system. Improving one part can create a valuable research direction without removing the constraints elsewhere in the chain.
When a product cites a paper, ask which result it actually implements. Is the company using the computation method, a related optical arrangement or simply the language of the field? A citation is the beginning of that technical conversation. It is not evidence that a complete commercial system inherits every result in the paper.
Read research with a deployment question
For creators, the practical question is what this work could eventually make easier: generating or updating holographic content quickly enough for an interactive experience. For buyers, the next question is whether that capability is present in the specific hardware and software they can obtain. These are related but distinct questions.
Keep a research file that records the demonstrated output, the apparatus used, the reported performance and what remains outside scope. Compare later claims against that record. This prevents the archive from becoming a sequence of impossible-sounding headlines and gives a team a grounded way to follow progress in wavefront displays over time.
Sources & dates
Factual descriptions are drawn from these sources. Practical evaluation suggestions and interpretations are Presence Atlas editorial analysis; no hands-on test is claimed. Supplier claims are identified as such.
Nature / Shi et al. · Original publication: 2021-03-10 · Retrieved 16 September 2026
JOSA / Leith and Upatnieks · Original publication: 1962-10-01 · Retrieved 16 September 2026
Editorial preparation: 16 September 2026. Actual site publication: pending review. This is a retrospective, not reporting published by us in 2021.