A neat and clean boot screen takes less than 5 secs to start.. Pretty fast and simple.. You can log in with your google account and access to any of the apps you can see in the next pic.
Here is the first screenshot of the Chromium OS. What you can see is the host key operation. Sundar(VP product marketing, Google) says that the UI will be changed in the beta release. This one is fine 'almost'. I've never loved chrome as a browser, FIREFOX still rocks..
