In a surprise move, Windows head Steven Sinofsky has abruptly left Microsoft right after the launch of Windows 8 and the Surface RT. Sinofsky was in charge of bringing the products to market and did so successfully, so his immediate departure came as a shock to some. Not so within Microsoft, where sources tell us the executive was not well-liked and wasn't well-positioned to lead the collaborative efforts necessary for the company's future success. He will be replaced, in part, by Julie Larson-Green, who will take up "all future Windows product development."