On another note, how interesting won't it be if that should happen...
A couple of years ago Google switched its main web server from Apache to an edited version thereof and renaming it something else (with a Google prefix or something), that alone had a big impact on the percentage Apache holds as a web server software.
Think of blogger, google earth, frappr, youtube and all those services disappearing along with it... Opens up a whole lot of possibilities for other webmasters to create similar services and take the lead early on!