Some people have far too much time on their hands.
Nice work! That's not even close to a 4" screen though (if outer dimensions are the same):
The only thing I like from your concept is the 4" screen, a button with touch capabilities is the worst thing ever, sony ericsson use buttons like that and trust me you really don't wanna have that ever...
A flash for the front camera? I hope this is a joke?!
I think the best concept is still this one:
http://9to5mac.com/2011/07/07/iphone-5-mockups-look-just-about-right/
Who are you to judge whether or not ones time is to be wasted or not?
Check your **** bro..