in defense of Windows (2000 or XP, other versions are unestables): the taskbar ans strat buttons are really functionally, and are OS very customizables. The advantage (in my opinion) of macs are the easy of use, and Mac are the steps using the OS more near the persons.
DesktopX are a ennhancement very useful at user; not only is a OS eye candy, it makes the OS more confortable; but it needs more: hotkeys show-activate objects, some 3D features (at this moment i'm not a programmer, but i think this is a hard work make 3D objects in the windows framebuffer screen), a timeline for really animations, free animation movement for the objects, more security (there's a themes that looses in memory and augments the memory usage).
I'm not a programmer, but i think i can make a little application with all the things the OS need (Windows&Unix&also Mac), but is a work very hard for me.
I thinked i can make this work. I'm a illustrator and a graphic designer not a programmer (well, in other times i programmed), and it's more intelligent make the work i can do, and make skins. In newer times i will do a theme i think is very useful, a theme with all thinks i need

In other order, if the customization programs aren't really usefuls in my opinion, i will make suggestions at developpers.
Finally: DesktopX is not the solution, but at this moment is the best way to customize my desktop, more than Macs, and Windows, and some shell replacements... my intention is not to say desktopx is a bad application, only that is not a application i consider really useful