Plasma Emission Technology!
Yes that right real 3D!
Sure this tech is 30 years off but how cool would it be?
http://g4tv.com/videos/50644/Japans-Laser-3D-Image-Display-Preview---CES-11/
http://www.aist.go.jp/aist_e/latest_research/2006/20060210/20060210.html
Edited Addition:
Another good experimental technology is ultrasonic tactile technology. This can add the sensation of touch to virtual objects.
http://www.youtube.com/watch?v=hSf2-jm0SsQ
Yes that right real 3D!
Sure this tech is 30 years off but how cool would it be?
http://g4tv.com/videos/50644/Japans-Laser-3D-Image-Display-Preview---CES-11/
http://www.aist.go.jp/aist_e/latest_research/2006/20060210/20060210.html



Edited Addition:
Another good experimental technology is ultrasonic tactile technology. This can add the sensation of touch to virtual objects.
http://www.youtube.com/watch?v=hSf2-jm0SsQ

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