The coronavirus pandemic and travel bans have accelerated interest in holographic communication.
Here is a photo of Swiss watch boss Christoph Grainger-Herr appearing in holographic form
"We beamed him from his office in Schaffhausen, Switzerland, to the event in Shanghai," says David Nussbaum, the boss of US holograms firm Portl. Its portals are eight feet tall, glass-fronted, computerised boxes. Inside the booths a life-size hologram of a person appears.Beam me up Scotty? Actor George Takei relives his teleportation days in Star Trek
"There is almost no latency [delay]," says Mr Nussbaum. "And were it not for the sheet of glass in front of the hologram you'd think the person was actually [standing] there. In fact, if there is no light on the glass so that you cannot see it reflecting, then you do think the person is actually there."
At Microsoft, its hologram communication technology is based around a headset called HoloLens 2. At $3,500 per unit they are considerably cheaper than Portl's system, but the 3D holograms are not lifelike.Instead, when two or more headset wearers call each other, their holograms are projected in front of each of them as somewhat cartoon-like avatars, that appear to be standing in the same room.
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