Note the word semi, because this webcam isn't a true 2-megapixel webcam. The 2MP-ness of the cam only refers to the still shots that it will take at 1600 x 1200. The video captures at the traditional 800 x 600 resolution at 30 fps. It includes head tracking and an integrated microphone.
HP's 2MP cam does have one unique feature—a wide angle lens that will cover 76 degrees diagonally and 65 degrees horizontally.
HP's 2-Megapixel Webcam [EverythingUSB]