Mashable: "If you’re among the many marketers trying to grasp the game-changing impact of Xbox’s motion-controlled add-on Kinect, you’re not alone. Even Microsoft didn’t realize what it had on its hands. When launching in November, Microsoft predicted sales of 3 million units by the end of 2010. Instead, the company sold 8 million in two months and recently entered the Guinness Book of World Records as the fastest-selling consumer electronics product in history. For brands, the excitement is just beginning — and so are the challenges."