The document discusses the growing trend of mobile devices and applications. It notes that mobile device shipments have surpassed 1 billion units and mobile app downloads are forecast to reach 17.7 billion in 2011. It emphasizes that mobile internet usage will overtake desktop usage by 2014. The document outlines the different types of mobile devices like smartphones, tablets, and their key characteristics. It provides examples of popular mobile apps and their success worldwide. Finally, it discusses the skill set required for mobile app development and resources available.