The switch could have a meaningful impact on the apps you use. At the least, it should reduce the need for iOS to juggle both 32- and 64-bit code. That's good for performance, whether or not there are meaningful upgrades to the apps themselves. The move may also spur more developers to fine-tune their apps for the A7 and A8 chips in recent iOS gear -- even if they don't need to use higher-precision 64-bit math, that could still lead to faster games, media players and other demanding titles. It'll likely take much longer for Apple to drop 32-bit support altogether, but the ball is clearly rolling on that transition.