Well, as far as I understand the technology, there's a projection of a 3-dimensional image emitted in very many directions. So what you see at 45 degrees (pola

Well, as far as I understand the technology, there's a projection of a 3-dimensional image emitted in very many directions. So what you see at 45 degrees (polar) angled to the screen would be different than at the normal (90 degrees). Then there's the azimuthal angle as well (you can walk around it if it were laying flat on a desk). Unless there's some other input indicating to the touchscreen at what angles your eyes are at, determining what you see, there seems to be no way to correlate touch/movement gestures with 3-dimensional surfaces. This said, I can still stipulate tremendous value in treating all gestures as acting from the perspective of the normal - you would have a 3d image under glass and every touch on the glass corresponds to a z-dimensional intersection with the holograph.