For the past 20-plus years, the Web has been based on a document-centric model, despite recent workarounds to provide enterprise-quality applications, new types of user experiences, and multimedia and real-time capabilities. With a renewed focus on applications, programming interfaces, enhanced graphics, offline behavior, and modern communications, the Web is entering its next phase of life. Today's Web has become a standardized, programmatic framework for developers to create exciting, active applications.