The pack promises the ability to play Portal 2 all the way through with the motion controller, as well as specifically-designed challenges that require the precision of motion control. One-to-one object manipulation is promised, whether you're grabbing objects, throwing things or deforming the new stretchy cubes.
Does the existence of this patch mean we can expect PlayStation Move support in the PS3 version in the future? No word from Valve on the matter as yet.
The pack, including the Razer Hydra controller, a full copy of Portal 2 plus the Sixense DLC, costs $139.99 and is available directly through the Steam Store -- but only in the US at this time.