many comments about screen aspect and "perfect" sizing of the phone.
well here's my 2 cents:
It's a funny thing, but when I look at my 3G, the screen size seems more than adequately sized and the shape is very comfortable in my hand. I love holding the 3G for this reason. It doesn't require a protective case (unless you're prone to dropping it) and IMO was the best SHAPE for the phone. But, the opposite happens when I use my iP4. The screen looks strangely too small, it's heavier, and it's really not comfortable to hold. I require a case on it because i've dropped it more in the first month of use than i have the total of years i've owned the 3G (currently use it abroad). Perhaps it's because the 3GS has a wider bezel and the screen aspect seems to compliment the overall shape of the phone better than the iP4(s) does. OR, could be my crazy perception of the two when compared side-by-side. Just seems like ever since i got my iP4, I wanted a bigger screen. Could also be because I got my iPad 2 at the same time as the iP4 but it just seems like the perceived size of the 4's screen is a tad smaller than the 3G. It could also be that the retina display creates less ghosting around the pixels so everything on the screen appears a tad smaller due to the precise-ness of the resolution too. or a combination of all those. Regardless, I'm all for a larger screen.
other comments about usability between a 16:9 and 3:2 screen. I tend to agree with the 3:2 people. I don't see how typing texts and emails on a 16:9 would be any better, quite the contrary.
I might be a unique user, but here's the top 10 things i use my iPhone for: (in order)
1. Checking email
3. solitare or other mindless games while on the subway or waiting-room type stuff.
7. viewing/taking photos
9. movie times (trailers app)
10. telephone calls
Now, some of these use typing in landscape. I really don't see how a 16:9 display makes typing any easier. in fact, at the current portrait width (which is the rumored width) won't make anything easier, expect games and video and possibly photos. So 50% of the above functions are used in landscape mode. While it might be great for landscape, it's certainly not good at all (or at the very least any better) in portrait. So, to me, it's not enough to warrant changing the current screen aspect.
But, all these leaked images look pretty legit, so be it.
I probably won't update my hardware this year anyway. I usually don't update until the latest firmware will no longer support on my current phone. And I suspect the iP4 will be supported for at least another two years...since iOS 6 still supports the 3GS.