Things that come to mind (other than the publically accessible link, which sounds helpful) :
- Autoscrolling / Auto switching between different dashboards to display more than one screen worth of content without user interaction
- Known compatibility with various “light” browsers (raspberry pi chromium etc)
- A possibility for metabase instance to act as a chromecast content sender (similar to groupon’s greenscreen)
- A tutorial about setting up a kiosk / digital signage style solution