An interesting user interface from Microsoft Research. Although, I have to say that it’s not the first time that I’ve seen something like this. At the Boijmans van Beuningen Museum in Rotterdam, their digital archive already uses a similar system.
In one gallery, the Digital Depot, a sample collection of some of the museum’s artifacts is displayed along the wall. In front of the wall are transparent touch-sensitive screens with images back-projected on to them. Visitors can look through the screen to the objects on the wall, as well as see the images on the screen. And just as in the Microsoft video, can use their hands to manipulate the images, to drag them around the screen or "open" them to retrieve further information about the objects in the gallery.