But remember the desktop isn't a 3D game, its a representation of... a real desktop. i.e. 2D sheets of paper stacked on top of each other. Introducing a load of 3D and/or transparency effects will make it distracting and less productive. No one has yet come up with a truely workable 3D metaphore for driving standard computer tasks, and if you want to see what a complete pigs ear can be made of it, look no further than Microsoft's Vista 3D Aero interface, and the trail of vomit left by beta testers.