lammert - 10:38 am on May 3, 2010 (gmt 0)
Looking at the screenshots on Wikipedia,
BumpTop is not something which can be seen at static screen shots. You have to experience it. Your desktop is more or less converted to a 3D room where you can organize and stack your documents the same way as you are used to with paper work. You can put memo's on the wall, combine documents etc.
There are some demo's on YouTube which give a much better idea of the functionality than those static pictures at Wikipedia.