This slick multitouch wall seems to work quite fine, and has an acceptable response time. Although some contacts are not registered. I like that it is shiny. Obviously they work with direct illumination, that means that they have infrared light sources behind the glass (opposed to internal reflection, where the infrared is in the glass only). This makes it possible to recognize movements in front of the screen as well, but not to distinguish between touches and movements close to the screen, I guess.