re: Google And Microsoft Explore HTML5's Future
Last time I checked, we live in a world of free will.
It is up to users (not Microsoft) to upgrade their browser version. Many businesses run IE6, 7, 8, and 9 and depend on them to run their huge investments in Intranet based web apps. So, it is not an easy (nor inexpensive) task for them to simply upgrade. Asking MS to stop supporting them is asking for them to cut the knees out from under their business customers. Fun maybe, but not business savvy. It's been more of a prodding by MS to get them to do so. IE6 usage is extremely low now anyway.
fyi - this article you responded to was published way back in November of 2011. By now, HTML5 (and CSS3) is a "done deal" for everyone as the primary standards targets to develop to.