Following the updates to the Chrome browser and Chrome for Android updates last week, Chrome OS has now been updated to the Chrome 59 train. Builds 59.0.3071.91, 59.0.3071.92 (Platform version: 9460.60.0, 9460.60.2) have been released for all devices running the platform with the exception of the Chromebook Pixel 2015 model. The update is rolling out now and should be hitting devices over the course of the next few days.
Like the Chrome 59 update for Android and the browser, Material Design is now enabled by default on the Settings in Chrome OS. Native printer support is also available now, not just Google Cloud Printing. You can now setup a printer via IP address on your network and print directly to it from your Chromebook.