Yet another cool thing in Javascript. Once you understand the power of Autolayout in iOS you don't want to go back to the old way (and in iOS7 you almost can't). Once this matures and people understand it (constraint thinking takes a while to puzzle out) I think it could simplify a lot of web design. Of course, anyone that refuses to turn on JS can't see anything. But that's almost pointless these days anyway.

Looking forward to it maturing.