writes "Until now the two standards bodies WHATWG and W3C working on HTML5 have cooperated. An announcement by WHATWG makes it clear that this is no longer true. WHATWG is going to work on a living standard for HTML which will continue to evolve as more technologies are added. WC3 is going the traditional and much more time consuming route of creating a traditional standard which WHATWG refers to as a "snapshot" of their living standard. Of course now being free of WC3's slower methods WHATWG can accelerate the pace of introducing new technologies to HTML5.
What ever happens the future has just become more complicated — now you have to ask yourself which HTML5?"Link to Original Source