Constantly seeking innovation just leads to disappointment, status anxiety and less money in your wallet. It's as though people are addicted to it and need the dopamine hit of something new.
With that said, for better of worse, Apple has hitched their desktop platform to Intel's bandwagon. That was fine when PowerPC chips were too hot and were languishing but now that we've reached the point where Intel themselves have started to hit the limits of what they can do with silicon lithography. Couple that with a general shift away from what has traditionally been Intel's bread and butter and they are looking more and more like an unreliable partner that can't meet Apple's needs.
Personally, I'd like to see Apple introduce Arm-powered consumer laptops. I don't give a toss about Windows compatibility and all the legacy cruft in X86 processors. I do care about battery life, reduced heat output, having a machine that's light and portable.
But then, you'd never get any uni students buying the new Arm powered iBooks, as they wouldn't be able to run WoW.