Google I/O showcased Android's growth (900M activations, 48B app installs), new developer tools (Android Studio, Play services APIs), Play Music All Access, and a Nexus-like Samsung Galaxy S4. Web advancements included WebP, VP9, data compression, and mobile checkout. Search, Google Now, and Maps received major updates. Page's Q&A focused on Glass, Android's future, and Google's societal impact.