Google has pushed an update for its dev channel brining it to version, 25.0.1324.1, (Platform versions 3196.1.0 for most platforms and 3196.2.0 for Samsung Chromeboxes) for all Chrome OS devices.
This build brings numerous improved features to Chrombooks including support for extended desktop and mirrored displays.
With this release Google also allows users to re-order the app list. Now only that it now also takes care of your windows. It offers "Intelligent Window positioning" which means if you don't move or arrange your windows manually, Google will 'arrange' them for you to "show you more at all times".
However, since it's dev channel there are some expected kinks. You may notice audio on some systems may be distorted when playing a single audio stream for a long period of time, or when playing audio on multiple tabs. If you are using Ethernet for your Samsung Chrombook you may be unable to connect using LAN. There is a workaround - just reboot your system with ethernet connected.
If you are using Dev channel you can also file bugs if you notice any.