I just thought of something. Maybe Apple is indeed steering away from the current formfactor to make sure they don't look like the samsung-clones anymore. Maybe Apple doesn't want to be asociated with cheap clones by keeping the current formfactor?
Edit. And give Apple an excuse (blaming samsung) to get away from the current mediasensitive antenna.
That could be one of the reasons, good thinking!
I don't know the legitimacy of the picture, it's still hard to tell, but it's definitely a prototype of a future iPhone.
The cases speak for themselves, i think we can expect a fantastic upgrade this time.