If the real reason in ab initio training is to get the student to "feel" the way the aircraft responds to touch and learn the judgement that is needed to place it where it should be visually I have difficulty seeing where the "box" helps.
No doubt training IFR the "box" is useful, but VFR, learning to feel and listen to what the airframe is telling youi is important, I doubt the "box" has any use at all, maybe a Wii would be better, in any event it smacks of overkill using a computer game to teach tactile and motor skills.