After reading the wiki article on Compiz, it seems to be the same animation/fluff shit Linux users got pissed off at Microsoft for including...?
What Linux users are pissed off at Microsoft for adding fluff? They must have sad and pathetic lives even by Slashdot standards, because you can turn all that stuff off.
What Linux users get pissed off at Microsoft for is forcing fluff, like when you have to use a GUI tool to configure something. But they are getting much better about embracing the command line. The next Windows will supposedly have even better headless support.
Compiz does do all the eye candy shiny shiny stuff. But you can turn features on and off atomically, and there is a great deal of configuration available for each feature. If for example you like many of the aspects of the OSX desktop, but some of the features bother you or you wish they worked a little bit differently, you can get the precise effect you're looking for with Compiz.
Sadly, my favorite window manager (emerald) is not being developed any more, but between emerald, compiz, and avant-window-navigator it's possible to build a maclike desktop which actually works properly, and which has only useful eye candy like smooth moves (nice for seeing where windows go) and an Expose-like feature with no borders. That is, you can turn them off. And of course, mipmapped previews.