Looks like the previous rumours were true about Google ditching OK Google in Chromebooks and replacing it with the more advanced Google Assistant. 9to5Google has spotted that the Google Home app now offers information that some Google Assistant apps will work on Chromebooks.
In the Google Home app, there is a section where you can Chat with your Assistant and there is a listing for phones, Google Home, Allo and now, Chromebooks. There is even an icon which represents the Chromebook for those of you that are still septical about the feature coming to the device, which indicates that Google is keen on bringing the assistant to Chromebooks.