The most important thing that was heard at the iPhone 5S launch event was talk of a “Desktop-Class” architecture using 64-bit ARM chips of Apple’s own design…. The most important thing that was heard at the iPhone 5S launch event was talk of a “Desktop-Class” architecture using 64-bit ARM chips of Apple’s own design.

Read more http://www.zdnet.com/2015-64-bit-arm-chips-in-iphone-5s-serve-up-taste-of-intel-free-future-for-apple-7000020524/