Thought on Google's latest changes? [Semantic code]

[Elev8]

I have just finished reading a WSJ article on recent changes proposed by Google regarding semantic code.
http://blogs.wsj.com/digits/2012/03/14/what-googles-search-changes-might-mean-for-you/

It may result in big ranking swings for badly coded sites and those which don't follow standards (such as forums).

It's a little scary for forum owners, so I'm a little worried as I don't really want to go through and clean up my install of IPB.

Any thoughts or comments?