Well, not tomorrow. However, I believe the wheels will start coming off the Windows bus in a few years unless they start changing their strategy now.
PCs are increasingly becoming service interfaces. Chromebooks are limited right now because they are uncompromisingly betting on that future. The question isn't what can your Chromebook do that your Mac or PC can't, but what can your Mac or PC do that your Chromebook can't. Every passing year, that list is going to grow shorter. Eventually, Chrome will kill Windows with convenience (and a cheaper enterprise licensing model).