Before we all start celebrating, take a closer look at the article that Eric referenced. Despite what it says, Microsoft will not - and cannot - "force" people to upgrade from IE6. It can only serve a new version to those users who have automatic updates enabled, and then only if the user doesn't opt out of it. I've never seen any figures for this, but my guess is that a substantial number of people in the world don't use automatic updates.
Personally, I'll still be checking my sites for IE6 compatibility for a long time yet - much as I hate to have to do so.