Tutorial : Application Development with HTML5
From TechEd North America 2011:
HTML5 is the biggest and most powerful HTML specification to ever come out of the W3C. Its roots come from a proposal to extend HTML4 to make it easier for web developers to create web applications. With more and more browsers supporting HTML5, ECMAScript 5 and other web standards, developers now have a strong web platform they can use to create a new class of application that is more powerful and interactive than ever before. What's in HTML5 that lets us take our applications to the next level?