With the new release of the beta version for Chrome OS I noticed perhaps the most major change to the OS since it was released. Instead of having everything inside of a browser window the new version instead looks a little more like a traditional OS by adding a start bar, and an actual non-browser desktop.
Others can give you the technology overview of this new chrome OS, but the thing that really gets this reviewer is the fact that it works a little more like a traditional OS. While there doesn't seem to be any real purpose for the desktop now as everything is still run in a browser window perhaps in the future this new style will make the OS more competitive.