It's really usefull. I can imagine using it to look after a wall's corner or a barrier without exposing your body. FPS immersion is increasing. Voice commands for commander mode is also nice.
From the interview: "Also, with Kinect, we’re looking into features that enhance the controls including peeking and leaning and tracking head movement as well as incorporating voice commands".
Announced that BF4 will use Kinect on XOne: "Also, with Kinect, we’re looking into features that enhance the controls including peeking and leaning and tracking head movement as well as incorporating voice commands".
Zicoroen's comments