How To Enable The New Look Wallpaper Picker in Chrome OS
If you are running Chrome 67 on your Chromebook, there is now a flag available to you that will allow you to enable the still under construction new wallpaper picker. The new picker replaces the old style picker which has been in the platform since, well, forever. It brings a refreshed, Material Design look to the picker and eventually will marry up with the backdrop wallpaper changer that is found in Chromecast.
That’s where the under construction part comes into the equation. Right now there is a commit in the Chrome OS Gerrit that points to a new wallpaper that is enabled by default and that it will marry up with Chromecast. The idea is that your Chromecast and your Chromebook will have the same look and feel and will be drawing from the same service in the background to give you your wallpaper options.