The way I see it, Apple is distinguishing between appliances and computers. The iPod, iPad, iPhone and Apple TV are appliances. If performance on these appliances falters, Apple looks bad. The MacBook, iMac and Mac desktop line are computers. Apple knows people expect to do what they want with computers, and that bad things sometimes happen on those machines. I really don’t see Apple extending control into computer applications as it does for apps on appliances. That would be suicide.