The World Wide Web Consortium has proposed "a new plan
that would see the HTML 5 spec positioned as a Recommendation—which in W3C's lingo represents a complete, finished standard
—by the end of 2014. The group plans a follow-up, HTML 5.1, for the end of 2016." Instead of working toward one-specification-to-rule-them-all in 2022, features that are stable and implemented in multiple browsers now will be finalized as HTML 5.0 by 2014 with unstable features
moved into HTML 5.1 (developed in parallel). In 2014, the commonly implemented parts of HTML 5.1 will begin finalization for 2016, with the unstable parts moved into HTML 5.2 (wash, rinse, repeat). Additionally, things like Web Sockets are being moved into their own modular standards
?) for "...the social benefits that accrue from such an approach. Splitting out separate specifications allows those technologies to be advanced by their respective communities of interest, allowing more productive development of approaches that may eventually be able reach broader consensus."