October 29, 2015—Today marks the one-year anniversary of the World Wide Web Consortium (W3C) declaring the HTML5 standard complete, a significant milestone in the history of the Internet and web application development. In this past year, HTML5 adoption has gone into overdrive, with more and more companies moving to HTML5 to deliver rich cross-platform web applications. The most recent examples include Amazon, Facebook, Google and YouTube, which transitioned from Adobe’s Flash to HTML5. Why is that? And why now?