This development is not surprising. From the beginning, Microsoft's brilliance been in figuring out how pc's could be used in the enterprise. It was only a luck

This development is not surprising. From the beginning, Microsoft's brilliance been in figuring out how pc's could be used in the enterprise. It was only a lucky side-effect that it also became the king of consumer computing. A consequence of this is that MS has always focused on making their OS and applications useful for businesses, at a great sacrifice in ease of use and security for consumers. Apple jumped in to focus on ease of use and security, but their computers have always been too expensive for mass adoption. Now Google is going for the mass market with a secure and easy to use OS. Microsoft can't really fight back because to do would mean abandoning the business market. And it understandably doesn't want to do that because that's where the big bucks are. So we should expect to see ChromeOS steadily gaining in popularity, though it is an open question as to how far it will also go in the enterprise.