Well, even look at the apache helmets. It is simple to have a system interference connected to the human head. by swiveling your head the 30mm cannon mounted on the apache swivels to your view, including aim. This same motion sensing could be used to "view the perspective" in the game itself. So you would move your head and the screen would pan in the game.
Really it is just the technology becoming available for public use and then of course there is the expense of the technology. I am afraid my friend this is just another case of "we are ahead of our time". Which is common.