Incomplete. 64 bit processors do allow for more registers and technical optimizations, but there are a few points you fail to address:
- iOS is written in ObjC, and the level of coding required to make full use of 64 bit systems is a high cutoff. When was the last time you trusted an app developer to properly develop optimized apps?
- I see no changes to the SMBUS or cache, further making 64 b processors pointless.
- If the underlying iOS system is rewritten to be 64bit, this also means higher memory traffic, which implies skyrocketing memory costs which, if not handled properly by updated hardware and a hell of a lot more RAM, would make the 64bit system worthless. In fact, less worthy than previous versions.
Sure, you might get rich apps and it'll look better, but the memory costs are too great in my opinion. Simultaneously running the risk of third party app development in a language known for memory leaks and poor performance if done incorrectly? That's a recipe for disaster.
This is, of course, a worst-case scenario opinion. I'm sure it'll do just fine. I just don't trust shitty app developers.