Planar was showing off exactly this at SIGGRAPH 2007 (http://www.planar.com/blog/2007/10/1/what-if-your-display-was-also-a-scanner/ http://www.planar.com/blog/2

Planar was showing off exactly this at SIGGRAPH 2007 (http://www.planar.com/blog/2007/10/1/what-if-your-display-was-also-a-scanner/ http://www.planar.com/blog/2007/10/1/what-if-your-display-wa...), but without additional optics you would be quite limited in what you could image.