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Susumu Tachi invented and designed an invisibility wall/cloak. This thing has been bouncing around the internet for a while. He seems to have gotten bored with his invisibility cloak and has decided to start work on an invisibility wall. It will most likely work the same way as the cloak, a camera on the other side of the wall captures an image of what is on the other side and is projected on the wall. Neat stuff, but until it is more than a prototype in the making, my care factor is lacking.

Invisibility Cloak [RealTechNews]