If it weren't Sunday, I wouldn't speculate, but it is. My 2 cents: iOS7 updates galore. Just imagine everything that could be overhauled. Even the old gray textured background we see is not very much like iOS 7.
iOS is in a big transition here. You can't even update apps at all unless you now include 'widescreen' support, for example. If you don't, iTunes reports an Invalid Binary (no default 586 image, etc).
So I would guess a huge overhaul, and typical Apple, is taking care of that vs. arguing or commenting on theories.
Grow up noobs. Holy fuck!