As soon as I read that sentence, I wondered the same. Sadly, no news yet, at least according to http://www.osnews.com/story/23229/IE9_HTML5_Video_Will_Be_H2....

>HTML5’s features are rather broad so whilst no word on HTML5 Canvas has been mentioned yet, Microsoft did commit to HTML5 Audio and Video which were demonstrated at their developer’s conference MIX10.

This is the most you’ll find on this topic publicly: http://channel9.msdn.com/posts/NicFill/Channel-9-Live-at-MIX...