since reaching PR is dependent on getting interoperable implementations, and since that requires the creation of a comprehensive test suite, I think 10 years for that is a reasonable guess, if the WG continues to work during that entire period
Tag: html5
Reinventing HTML
It is necessary to evolve HTML incrementally. The attempt to get the world to switch to XML all at once didn’t work.
wow! sensible words on the future of HTML from timbl. there is yet hope for the web, and for the w3c
Gregor J. Rothfuss 