It will be interesting if you can dual boot MAC OSX and Windows. Or, if they developed Windows emulation software that is much faster than virtual PC. It would be nice if you are browsing a web site that has a video that can only play in Windows, you open up an emulator, run internet explorer and view it without having to run Virtual PC or look at it on another PC.
I bought the Power PC iMac about a month ago so I am kind of bummed. But, I like to let other poeple buy the first revision and see if there are problems before I buy anything