honestly, unless advertisements can be disabled without losing website functionality, i hope html5 dies.
i can picture it, you go to a website, and the only way the website works is if all the advertisements are working in conjunction with each other, as in plugging in website code into the html5 ad, in a way that would kill the website unless all ads were on.
at least now, we have flash block and ad aware, which get rid of almost all advertisements, but i can see html5 being another hellish era on the internet.
granted this is just a possibility.