The finder is described as a 3D environment with windows, files and docks that can be organized on different layers in the depth of the finder (a bit like depth of field in photo).
However, this is not entirely new, and it strongly remind us a project developed in 2002 by MacWarriors under the name 3D OS X:
You could browse through files and folders hierarchy of your HD in 3D. It is unclear if a Finder in 3D would use a true 3D technology or the more classical subjective 3D system, but it looks to be the future.
