The 3D desktop prototype for Windows, called BumpTop, does some must-see-to-believe wrangling of digital documents as if they were physical pieces of paper. Reminds me of the touchscreen prototype I saw at ETech in March. Words don't do this justice; just hit that play button.

The icons need to be more verbose, but this is really neat. Is this what Vista should have been, something interesting?

BumpTop desktop emulates physical documents - Lifehacker