I'll shortcut this thread quickly with the following:

GeOS MacOS Classic TOS Amiga Workbench Xerox PARC

/thread.

They also copied the dock and expose.

And Apple copied the dock from RISC OS...

<mother> Imitation is the fondest form of flattery. </mother>

yeah because Apple invented simplicity? and who cares? as long Apple doesn't sell its OS for PCs I don't care.

Actually it looks like they imitated some features and solutions from OS X, not just simplicity per se. For instance the dock, how the user can control the menubar (taskbar in Windows) and how you select a wireless network. By Redmond running their photocopiers ;) Windows inherits some simplicity. I'm drawing those conclusions just from looking at the pictures. I wonder if they are starting to "get it" now.

I think it's great. When I am going to run Windows once in a while in the future, it will feel more like OS X.

nobody's saying it's a bad thing.