Proactive measures in digital certificate security
googleonlinesecurity.blogspot.com
googleonlinesecurity.blogspot.com
To me, it sounds like they're trying to consolidate their image under the "Symantec" brand by moving browsers off the old "Verisign" root, but they don't think they can move code signing. However, since code signing is outside the scope of CAB, they're stopping their audits.
Or at least, that's my take.