vizcave head tracking curiosity

[Gladsomebeast]

As the user's tracked head gets closer to a "powerwall" the image appears to shrink if you are just looking at the desktop view. In my mind the conceptual idea that justifies the shrinking image is that as you get closer to this "window on the virtual world" your field of view increases. To fit the more data on a fixed sized screen, the image starts to shrink from a fixed perspective. If you were being tracked and moving closer to the screen, the shrinking size of the image is compensated for by you getting close to the screen, thus the perceived scale of the virtual world does not change.