I do not really know but I would bet Samsung and Qualcomm are working really hard at their chips to match Apple. And sure Apple has a 2+ year lead, especially f

I do not really know but I would bet Samsung and Qualcomm are working really hard at their chips to match Apple. And sure Apple has a 2+ year lead, especially for the Apple Watch, but I am also pretty sure that said companies are trying hard to snatch some engineers from Apple. The great deal about ARM devices is not that they are "RISC". It's that they are open (as opposed to x86) and ARM does half of the work for you when you design the chips. If Apple is really careful they will maintain their lead but if not I give it 5 years maximum till they are outmatched