I ask the question because I have no idea and I am curious if some of the more experience folks out there have first hand knowledge.
For the most part, even from what I have seen of Windows 7, if would appear the PC desktop is still pretty much 2 dimensional. The only exception that I seem to find is a some third party software for an open source OS, which the name of slips my memory at the moment. 
I would have hoped that with the multi core processors and faster memory and 64 bit systems being common that new and exciting Graphical User Interfaces would have been developed by know. I have seen those peeks at some stuff by Microsoft but when are they going to be available and at what price? And no, touch screen ain't it.
I would really like to see some try at doing 3 diminsional interfaces. I think Stardock has some programs that would benefit from what could be some nice capabilities. Now I'm not saying WindowBlinds, not sure have that would work, but possibly DesktopX could be made a lot more interesting being in the 3D environment. Imagine widgets or gadgets that could be zoomed in or out on. It would allow more items on the desktop without concern for resolution settings.
How about something like a information cube. You have six sides or surfaces in 3D to use for time, weather, systems info, etc., with a zoom function that again would take up less space when not in use.
It seems rather of waste of everyones time with all the advancements in hardware that this technology has not move forward by now.
So those are my thoughts, how about yours? It would be nice to see someone from Stardock reply here, might just give us something to talk about.