The concept behind BumpTop 3D Desktop is that people organize (or disorganize) items on their desk to convey information by how and where they are placed, and that this could be simulated on the computer desktop using a 3D physics engine.  For example, let's say that you keep piles of papers that have to be processed by the end of the week on one part of your desk, say an IN box, and you move them to an OUT box as you deal with each one.  With BumpTop 3D Deskto...