mattur - 4:54 pm on Mar 28, 2013 (gmt 0)
The brainiacs at whatwg assume browsers will be good enough by then to not need versions of html anymore and switch to an evolving standard without versions.
Browsers have always worked this way since the beginning. The only thing that has changed is W3C specs (and WHATWG specs) now recognise this.
Still wondering what they'll do when HTML 6 comes along.
They'll do exactly the same thing they did on the transition from HTML0 to HTML2, HTML2 to HTML3.2, HTML3.2 to HTML4.01, HTML4.01 to XHTML1 (as text/html), HTML4.01/XHTML1 to HTML5, and HTML5 to HTML5.1 (i.e. continue working as before).
Would you expect all current browsers to reject HTML6 pages? ;)