I fired it up and used it briefly this weekend. My reaction is that Chrome OS is ahead of its time, and won’t really be useful until internet access is everywhere. Even then, it will have severe limitations unless/until all apps move to the cloud. I think it will be suited for netbooks, but not much else. That of course could and probably will change at some point in the future, but I think we’re a ways off from that. It really strikes me as something that turns a machine into a web browser appliance, at this point in time. I could see using it as a secondary OS, but I wouldn’t sacrifice my other apps for it (again, at this point in time).