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There is new technology going around and that`s holograms. Like new holographic air hosts and holographic idols like Miku Hatsune. But for Miku Hatsune it`s a 3D concert ( http://www.youtube.com/watch?v=DTXO7KGHtjI )
(Photos not mine)
Anyway it`s pretty cool and I think it`s pretty helpful. The hologram don`t need breaks and the should can repeat things over and over and would not get agitated with you and are there to try and help you.
Pretty neat huh?