Thanks for reaching out, @Gordon_Cameron!
Currently the only devices that we send the display information for is the Chromecast Gen 1, Gen 2, and Ultra. While we do not utilize the display on other devices currently, I’d like to recommend making a post in the Feature Requests section of community. This allows us to gauge interest for requested features. Our product team and developers keep a close eye on this category, so it’s definitely the best place to propose a change like this and get feedback from the Community.
The only device that we are aware of that officially supports hi res is the Chromecast Audio device. You can read more about the differences in hardware in our Chromecast article in the Knowledge Base.
If you have any other questions please feel free to reach out!
Kind regards,
Dylan