Google Chrome OS vs Microsoft Windows

I was looking through all my favorite web sites for news on Friday evening when I ran into two news reports that I thought were very interesting. Microsoft showed up at their Professional Developers Conference in LA with a half-baked presentation about Internet Explorer 9 that just happened to make press the day before Google announced the release of Google Chrome OS as open source code. Is this a coincidence or an emergency reaction to the realization that Chrome OS could be a very serious threat?

Tags: Chrome, Cloud, Cloud Computing, Google, Google Chrome Browser, Google Chrome OS, Internet Explorer 9, Microsoft, Microsoft Windows, SaaS, Software as a Service, Web 2.0, Windows, Windows 7