Evolution or compromise?
Apple are often berated these days at the lack of thinking differenly and not coming up with novel ideas. Additionally they're repeatedly accused to pinching the ideas of others. However, when they genuinely do consider something a little whacky (i.e. 64-bit processor in a mobile phone) everyone pipes up questioning the reasons why, claiming there will be little (or no) benefit, that it's overall a bad idea. It is worth remembering that Apple first successfully mainstreamed the idea of a touchscreen-only mobile phone way back when, as there have been plenty of "me toos" since we can be pretty certain they got something right. In two or three years time it's not inconceivable that all new mobile devices will be equipped with a 64 bit CPU, with an OS and apps to support that. It's what's known as evolution. Something I see Apple are pretty good at and something that many companies are not - preferring just to sit back and be a "me too".
Incidentally, whilst Apple have not increased screen size beyond 4" as it affects useability and convenience to carry, there are plenty of Android devices about for those of you who do want a phablet. Personally, I have an iPhone and an iPad - two well suited devices that compliment one another rather than become a single compromised device that fits neither job particularly well. Of course we mustn't forget that it's the cloud that's the glue keeping stuff in sync; and it's this glue that we need to feel confident in with regard to robust security. Worryingly I think there's some way to go here.