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I'm still waiting for my Helio Display - https://en.wikipedia.org/wiki/Heliodisplay

It looks like the last time their website had content was 2016 - https://web.archive.org/web/20160726091433/http://www.io2tec...

But it is (was?) essentially a projector that used lasers and a small amount of ultrasound-generated fog (which they really downplayed in favour of a lot of talk about focused air currents) to project a 2D image in space. They termed it a mid-air hologram.

Perhaps not the best tech for viewing anything much, but surely we all want to recreate Princess Leia's projection from Starwars?



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