The specs probably won't match, but knowing Apple, this design is highly plausible. Yes, it's the same iPhone, only with a bigger screen and new internals. But the iPhone's iconic look is something that shouldn't be tampered with without a big reason. We expect Apple to go for a radical change once the available technology allows for something truly ground-breaking. Look at how the Cupertino company offered the same old Mac Pro for years, before its 2013 incarnation awed everyone with its unique design.