The processor cycles are contiuing, maybe the rate has decreased a bit but remember: The G5 is now appearing in lower end models like iMacs, and the G4 is in low-end laptops (iBook). It's not completely out of the question in that Apple are starting to consider the G6!? (Is it?) What I mean by this is a different generation of chips. With concerns to portability, if I were Steve Jobs, id be thinking now of a whole new range of processors, call them G5p's, that wouldn't be G5's but a different type of Processor that would be that much better than the current G4's. At this stage last time (G3 in iBook, G4 in iMac, Dual G4 in PowerMac) Apple released the G5 - remember?!