Apple keeps pushing there iphone as the #1 mobile gaming device and in order to stay there they need to switch to quad core processors.
Why does Apple
need quad core processing? The current iPhone, and recent iPads, all game very well... with dual core. The current iPhone 5S with its little 1.3GHz dual core
decimates its quad core multi-gb RAM competition in benchmarks... Again, when Apple feels they
need to go quad core, they will... but a 64-bit dual core is more than capable of running games... and the future of 64-bit processing on iPhones has yet to be written. Apple's standard for new device releases, Twice as fast as last years, I think can be accomplished in the iPhone 6 without the need to go quad core.
You would be surprised how much more battery you need for a 4.6" 720p screen to match the current battery life of the 5S. A bigger battery would complement the faster processor, more ram and bigger screen.
I am surprised at how much battery Android devices require for a lot of things. Bigger screens being one of them. But seeing as there hasn't been an iPhone with a larger screen yet, we don't know how much extra battery a 4.5" or 4.6" or 5" 720p display will need compared to the 4" Retina on the current iPhone. Apple could introduce a new screen design other than the traditional IPS LCD, perhaps the rumored IGZO display technology from Chimei Innolux, that achieves the larger size and increased resolution, while
reducing the amount of power needed to run it.
We don't know. All we know is, Apple's track record would indicate that they won't simply fall in line with the manufacturing practices of their competition. Going 64-bit, instead of quad-core with excessive clock speeds, is hard evidence of that. Apple will zig when everyone else is expecting them to zag...