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Holograms are light field recordings that, when reproduced, can appear as static or dynamic three-dimensional visuals. The term is also more generally applied to any image that is rendered to appear in 3D. The accurate digital reproduction of faces, bodies, and other complex structures in dynamic 3D form is critical to the evolution of AR and VR in the metaverse, and holograms, variously combined with deepfake technology and synthetic media, may soon inhabit our everyday environments. Holograms have been used to produce concert tours featuring bygone stars in virtual form, and may soon allow production companies to draw popular synthetic media characters, celebrity standins, brand spokespeople, historical figures, and lost loved ones out of our screens and into our spatial environment. Biggie Smalls performed in the metaverse in 2022. In the medical field, holographic mapping can provide doctors with a 360-degree view of a patient’s internal organs, vessels, bones, and tissue, and assist with diagnostics and surgeries, with multiple apps already approved by the US Food and Drug Administration. As this technology evolves, it may be used to display elements of the metaverse without users having to wear smart glasses. Google’s Project Starline creates a very real sense of physical co-presence in a bespoke chat booth, and is currently being tested with select enterprise partners to connect remote offices. It sounds simple, but Google’s research paper highlights the many challenges involved in tricking your brain into thinking a real human being is sitting just a few feet away from you. The image needs to be high-resolution and free of artifacts, but it also needs to look right relative to your position in the booth. The audio system needs to make it seem like the source of sound is coming from the person’s mouth. People who have tried Starline say it’s one of the most impressive tech demos ever. Google has found that people using Starline focused 15% more on who they were talking to in the booth compared to on a traditional video call, and that conversational memory recall was 30% better.

Holograms

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