The most likely result of this Infinity Ward-branded Piston is simply that, like often happens with consoles, the developer is endorsing a version of the hardware emblazoned with their logo, allowing owners to show off their allegiance to the Infinity Ward brand, their franchises, and the ideology of the studio overlord. Meaning that this is a standard Piston with a logo painted on.
Another possibility is that Valve have swung to have Infinity Ward launch their next game (rumoured to be Modern Warfare 4) fully compatible with the Piston. Making sure that it is fully optimised for the mini PC and to support all the Steam overlay that may be part of the computer's living room setup.
A third possibility is that someone at Infinity Ward has made a three-times scale version of the Piston, iPhone, and blurry computer monitor, just to troll the internet.