Again, what app is the average person who understands nothing about specs going to run on such a frequent basis that's going to make their MacBook run like poo to the point that they fall out of love with Apple?I think the down side is many who dont understand what they are buying will buy them for the fashion aspect - and ultimately fall out of love with the mac ecosystem and osx when they find it running like poo in the not too distant future.
Mail, Safari, iTunes, Photos, iWork/Office are probably the majority of the apps that they'll be using, and based on none of them pushing the processor of my 2012 Air over 10-15% (except for quick bursts when importing photos), I simply don't see how these are going to peg the new MacBooks processor at 100% to where it's slowing the MacBook down to poo status because things are waiting in a queue for processor time.