The BBC reports (Google to launch operating system) that Google will release an operating system aimed at netbooks in 2010. I particularly like the HAL9000-like logo (see picture). There's a collection of media comments on this development, mostly commenting on the threat to Windows.
Of course, netbooks kicked off with a focus on Linux as their OS, until MS realised they'd committed a strategic blunder and moved to "suggest" to the PC manufacturers that they ought to use Windows XP, which miraculously had its lifetime extended (though this may have been in part due to the poor reception of Vista and its capacity to gobble up computer resources). So forgive me for being a little sceptical that the Chrome OS will unseat Windows in the netbook market (but I would be delighted to be proven wrong - we certainly need a more competitive OS marketplace).