A new flagship iPhone - a new chipset by Apple! That's the way it usually goes, but with the introduction of the iPhone 5S, it seems Apple has a special treat for us. It appears that the new 'A7' chipset that will power Apple's finest will actually have a 64-bit architecture, which makes it the first mobile processor of this kind...
Source: http://www.phonearena.com/news/iPhone-5S-comes-with-a-64-bit-A7-chipset---first-ever-on-a-smartphone_id47304
Source: http://www.phonearena.com/news/iPhone-5S-comes-with-a-64-bit-A7-chipset---first-ever-on-a-smartphone_id47304