Chrome OS potentially offers an interesting combination of innovation and opportunities. We have seen the dominant user interface paradigm go from thin client in the mainframe era to fat client in the desktop PC era. We have seen the failure of modern thin-client interface devices to gain significant marketshare from desktops. Most of us have got used to treating the browser as just another application which happily co-exists with other applications.
So what does Chrome OS bring to the equation? At this point it is mostly speculation, but to me it is clearly going to be an OS with a thin-client interface and services located on the same desktop, on the web, or both.