I'm delighted by the possibility of that change. Apple's getting big enough, it could drive that development, particularly since much of it would be covered by iPhone, iPad, and Mac sales. The chip transition could be handled by their compilers. For a time, they could create code for both much as with the Intel transition.
Besides, this will build a fire under Intel to speed up development of low-wattage chips.
"It's better to be a pirate than join the navy."