I didn't read all the links above, so this may be a dupe, but...
It's basically just a scale-up of the current design for a bigger screen.

Looks nice, though. I guess so long as it fits a pocket, it'd be popular.

Awesome iPhone 5 (iPhone SJ) Design Concept



The iPhone 5 concept would also include a new 10-megapixel camera and an A6 dual core processor.
However, the concept design is based on the current iPhone 4 and 4S.