If you weren't paying attention during Andrew House's part of the Sony presentation tonight during E3 tonight, you might have missed a knock on the previously mandatory Kinect.
House gets on the stage to boast about the PS4, and makes quick mention of how the PS4's motion control peripheral was available as a choice to gamers. That's some shade right there. Sony's confidence is showing, though it almost feels like punching down a little, in my opinion.
You can watch a clip of the specific moment above.