Imagine a fork of various Apple OS's that took skeuomorphic interfaces to their logical conclusion!
We need a name for this: an open set of parallel computing universes. Maybe OpenCandide: The Best of All Possible Worlds. (Ironic misinterpretation of the phrase intentional.)
I'm not sure if you were implying otherwise or not, but: spatial metaphor file managers are not skeuomorphic. Skeuomorphism strictly encompasses non-functional interface elements, such as faux-leather stitching on Apple's old address book application. The spatial metaphor Finder in OS 9 was 100% functional.
The way it remembered all of the details (size, layout, position, display mode) of each window and the way each window had an unbreakable 1 to 1 connection to a folder made it a joy to use. It allowed the user to identify what window belonged to a folder at a glance and to be able to set up a whole workspace arrangement and have it be remembered automatically by the Finder.
