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I remember IO2 Heliodisplay from around 2007. Now their site seems to be dead. > This holographic-style display works by projecting a 2D image onto a cloud of

• Nursie 2y ago
  I followed them for ages, such cool tech for the early 00s when they first publicised it. But it never seemed to have gone anywhere. They were very cagey at first about the fact it used water vapour because they didn’t want people to think it was just projection onto a vapour screen when they had some sort of directed laser tech. It still needed the water though! If I were to guess why it didn’t reach any sort of momentum, I reckon they couldn’t control the costs or get the brightness good enough. But that’s really speculation.