What if you had a 3-D system, no not the 3DS, that would be more like a virtual reality. Such as wearing special glasses that was a device itself, that would have an LCD screen inside of it. The screen will be the only thing you will see. The dimension would be as if you were actually looking around you, something like Domed Imax theatres. and you would have an SD memory card and a controller.
Maybe something like this will be out in the future.