I remember being wowed by this at the time, but, looking back on it now, I think I was maybe just captivated by the fact that they were throwing a bunch of tech

I remember being wowed by this at the time, but, looking back on it now, I think I was maybe just captivated by the fact that they were throwing a bunch of technology at it, not what it was accomplishing. I see two ideas for how it might be useful that are practical: Putting windows "out of the way" when they're not being used, and attaching notes to files. For the first, I'm not sure the 3D works well with how I like to work, because I like to use up all my screen real estate, and a bunch of floating tilted windows are still in the way (because they take up a bunch of space - maybe 15-20% of the real estate of the full window, in the examples from the demo) using this approach. On OS X, by contrast, I have several options, all of which really do get the window completely out of the way - I can hide it, I can minimize it, or I can stick it on its own desktop. Throw a window tiling tool like Spectacle in there, and I get a pretty large amount of power, while still keeping things simple. Adding notes to files by writing on the back of the window feels odd to me, UX-wise. To view the notes, do I have to open the file and then flip the window around? How do I know that a file has a note, without doing that? I think I'd rather just have a "notes" bit of metadata that is viewable in the file manager. In general, I think that 3D is maybe just awkward for organization. Evidence: Out in the real world, we have invented all sorts of objects for 2d-izing - or even linearizing - things for organizational purposes. Shelves and file cabinets, for example.