A) This "leaked" new iPhone has not been confirmed by Apple in any way, and I would not be surprised at all if it's not the real deal. The media had me believing there would be a major redesign last year complete with leaked parts, cases, and assemblies. What we got was the iPhone 4S (which is fine, I still like the design).
B) Apple has very good reasons for whatever design they come up with. Personally, I don't care if the screen gets bigger or not, but people will form their own opinions on that. Apparently phones are now supposed to look like gigantic cinder blocks, so I guess the bigger screen will please some.
C) If the new iPhone is simply taller and not wider, I don't think it's going to look like a remote control as some of you seem to think. They will stretch the phone itself a little bit, but they also have room to work with on the current design.
I guess my point is, believe NOTHING until you see the actual phone. I don't even officially believe the September 12th date, but the fact that Jim Dalrymple gave it a "yep" is a pretty good sign.