A Qualcomm executive is quoted as saying that Apple's announcement of a 64-bit processor is Impressive, but not innovative and the 64-bit A7 processor found in the new iPhone 5S is a “marketing gimmick” at this point, giving no real benefits to the user.
Anand Chandrasekher Qualcomm’s senior vice president and chief marketing officer said in an interview that the main benefit of a 64-bit processor is “memory addressability,” but that’s “not relevant” with today’s products, especially with the iPhone 5S which has only 1GB of RAM:
Predominantly… you need it for memory addressability beyond 4GB. That’s it. You don’t really need it for performance, and the kinds of applications that 64-bit get used in mostly are large, server-class applications.
That is not to say that QualComm will not release 64-bit processors. Having larger memory onboard the (4Gb and above) can utilise the full benefits of 64-bit computing.
From an engineering efficiency standpoint it just makes sense to go do that. Particularly the OS guys will want it at some point in time,” said Chandrasekher, who declined to say when the its 64-bit chip would be introduced.
In addition to Apple and Qualcomm we also have Samsung and NVIDIA readying their own 64-bit chips for future smartphone and tablet market, and Android 4.4 (Codename Kitkat) is also rumoured to have a 64-Bit Dalvik Cache (This is all rumour at the moment).