Interesting comment. I hadn't seen that before, but the demo certainly shows a very cleverly designed gesture-based pseudo-3D UI. Kudos for the concept.
That said, it looks an awful lot like a way to make your computer's desktop as messy and non-functional as your physical one. I suppose the "heap of documents" metaphor might work for some people, but it's bad enough on the 2D desktop--adding a third dimension would just make it worse. Apple (and Microsoft, for that matter) are both going in the opposite direction--use advanced search to obviate the need for the visual metaphor at all.
'course, we live in a visual world, so the average user often doesn't work that way. I do find it interesting to note, however, that the old UNIX-jockys I know operate that way--everything is a search, "folder-based" organization is meaningless, as does my not at all computer literate mom--she has several hundred files in the same location, and just uses the Finder's "Find" command to get EVERYTHING--there is literally NO organization on her computer.
