- Forum: iPhone
I think Apple waited until they reduced the power consumption on the chip enough so that they get decent battery life without having to bulk up the device. If you look at the benchmarks on the A8, they're not a huge leap above the A7. But, according to Apple, the A8 cut the power consumption in half. And I think that was the design goal that Apple had in mind before going to the larger screens. A lot of what Apple does nowadays seems driven by the performance/watt.