Unless Google does several MAJOR updates in the next couple months the Chrome devices will be feature deficient to the extreme. Windows netbooks can do 99% of what a PC can do. On a smaller screen and with a weaker processor but they can still do it. ChromeOS can barely handle reading an SD Card.
On the other side of the equation Windows netbooks can do everything a ChromeOS netbook can by simply installing the Chrome browser. The machine won’t come on in 6 seconds but other than that a Chrome-based netbook has no advantages.
This could be overcome if Google had embraced the community and sought out advocates for web based computing (that’s how Firefox spread virally). But they haven’t done that. In fact what they did do was send a CR-48 to every hardware reviewer on the web only to have it panned over and over and over again. So instead of having ChromeOS fan sites they have Engadget and TechCrunch saying “this kind of sucks”
Given all that I just don’t see these selling
Edit: I forgot to mention you have HP pushing WebOS on all its computers which has a lot of the advantages of ChromeOS and a lot more features to boot.