The Official PlayStation Magazine talked to Michael Denny, the vice president of Sony Worldwide Studios Europe, about the motion aspects of the new DualShock 4.
“So its not a Move controller because the Move controller is different and will be compatible with PlayStation 4 and the new camera. The feature your talking about is the light bar and how that may interact with the camera. Obviously the new 3D stereo camera and HD feed [will] be a lot better with AR aspects, and it can track the light source clearly in 3D so there are going to be features possible in a motion sense there. And obviously the DualShock 4 has improved SixAxis motion sensing so motion gaming is possible with the new controller”
Read more at the Official PlayStation Magazine