This is Gizmodo with the iPhone 4 in their hands people, we may not have a working lost device in the wild but we have the next best thing. Parts that are clearly for the new iPhone.
It's over, the speculation should now rest on the internals. Those hoping for a virtual home button, wider screen, or a plastic back are SOL and we already know this. It may or may not have NFC though, that sort of stuff is still up in the air.
However it will be taller, it will still have a physical home button, and it will have the two-tone & all in one design we've seen floating around. I would bet my life on it.
Apple just isn't into changing stuff like that for changes' sake. Here, there is very little downside. You get more screen space for lists and pages in portrait, proper 16:9 in landscape, your thumb doesn't have do do more work or travelling, and UI elements aren't blown up or shrunk, all while satisfying the public's demand for a bigger screen.
Seems pretty perfect to me, and moreover it is already set in stone. We've seen the iPhone 5, it's the two tone metal casing design that's floating around. It'll be longer, the glass parts make that clear.
Assuming otherwise is just hoping blindly against the evidence. Every time there has been a big leak like this regarding Apple, it ends up proving to be the final design. Happened with the fat Nano, happened with the iPhone 4 and it has happened again with the 5.