Folks, let’s don’t get too excited about Google’s announcement of a “Chrome” operating system. They’ve already said that it’s oriented toward netbooks and other entry-level PC devices, and that most of the interactivity will be web-based.
In other words – it’s not a desktop operating system as you understand the term. It’s not going to compete with windows. It’s going to be a glorified browser than doesn’t need Windows to run.
Is that significant? Yes. But it’s not a Windows (or Linux)-killer.