There's a wide range of Android phones and screen sizes. Not everyone wants a phone with a 4.5" screen so don't really see why I'd need to know what the battery life of a hypothetical 4.5" iPhone will be when in most likelihood, Apple isn't going to release one. Battery life is one of the factors affecting my purchase so I just want to know what that will be regardless of what the new form factor of the iPhone will be. Whether I would like the iPhone's new form factor if Apple does change it is another matter.
My most used Androids actually have smaller screens than the iPhone (Xperia Ray 3.3", Xperia Active 3") but despite the latter's smaller screen, it still has much crappier battery life. I'm quite happy with the iPhone's form factor and wouldn't be interested in a bigger one (unless they improve battery life really, really drastically).
Well, you chose to quote me, and a bigger screen is important to me so that's the reason I brought up the subject of an apples to apples comparison.
I think it is fair to say that Android phones are trending towards larger screens and at some point in time Apple will likely be forced to submit to consumer demand.
Bottom line is that we're both happy with our respective phones, win-win
