In case you thought that those 3D TVs that the big companies are trying to sell you are cool, you have not seen the pCubee yet.
This is 3D in a box form, really, as the five screens unite so that you can have a view of the scene inside from any angle that you choose. It can somehow detect where the user is, and will always show the right scene. It even can do some interesting interactivity as well.
Well, this tech is a little too large to be mobile and too small to be in home theaters, but I like the way the inventors of this device were thinking. The pCubee is still a concept, though.