The document discusses the mobile ecosystem, including key players like carriers, manufacturers, developers and users. It notes changing power dynamics with platform providers and developers gaining influence. Different types of mobile users are identified. Mobile trends in 2011 include the rise of apps and mobile fragmentation. The smartphone operating system market share in the US is shown, with Android growing rapidly while Blackberry declined. Worldwide smartphone sales in 2011 are provided. Various mobile platforms and their strengths/weaknesses are briefly outlined. User experience and device design are highlighted as important factors. Worldwide tablet sales in 2011 are shown, with Android expected to gain major market share. Handset manufacturers and their roles are mentioned at the end.