In the scenario where you can easily zap between neighbors channels with a channel up/down action (see Add channel up/down action) it would be great for users having multiple tunners available to benefit from a predictive tunning feature.
This way, if Plex detects that I am currently “zapping” (e.g. multiple channel up action in a short time) then Plex can pre-start the next channel(s) in background so that the user does not have to wait between each channel.
The TVheadend/Kodi combo already has this feature.