Take Microsoft Surface, sprinkle it with fairy dust, and you might have something close to Microsoft's SecondLight, a new technology in the works from Microsoft Research.
The experimental SecondLight technology adds a second dimension to Surface, allowing users to slide "magic lenses" over the display to provide a second surface that can be linked to the first. In one example, Microsoft researchers projected a picture of a car on the Surface display. But add separate, portable pieces of glass that can be moved across the display, and presto! the glasses are transformed into "X-ray specs" allowing a wireframe model to be viewed.