Many have wall mounted TVs with Grafana running on them. One problem is how to reload or change the dashboard on those TVs remotely. One way you can do this is by using playlists. If you create a dashboard playlist for every TV you can then later change that playlist. The TV running the playlist (even a playlist with only one dashboard) will reload itself every cycle. So if the cycle time for the playlist is every 15min it will do full reload of the playlist.
So if the single dashboard the playlist contained has been updated that the TV will now show the latest version of that dashboard. If you wish to view a different dashboard just change the dashboard in the playlist.