iPhone gaming is normally portable by design. But sometimes - normally when a game has terrible touch controls - you want something more substantial. Like this.
Products like this have existed before, of course, but this will be one of the first "official" pads, with iOS 7 now supporting a standardised controller scheme.
Should be good for those games that need it, but anyone who runs emulators on their phone will be even happier with it.
Logitech gamepad [Twitter]