My impression was that Chrome OS was supposed to be a netbook OS, focused mainly on getting online and a browser up and running, and little more. That is as far as you can get from a universal OS.
Anyway, since we really have next to no detail, I guess this is all wild speculation, so discussion has somewhat limited interest until we get something solid.
As for Windows beeing doomed... I kinda doubt thousands of companies worldwide is going to ditch their current platform, all their current software and jump on something entirely new and unproven.
If Linux failed as a desktop OS against Windows (with massive centralized administration features) in the corporate world, how will a Linux distro with even more trimmed down feature set going to be appealing?