Tablet for me is mostly comfortable media consumption. Especially when the wife and kid are sleeping or when traveling.
My primary use for smartwatch is media controls when running, so I don’t have to pull out my phone to play/pause/skip tracks etc.
I’ve also found that it’s handy to use for timers for cooking.
I’m running nixos Linux on my server and laptop, so its doable. On my tablet ATM, but I’ll follow up with a DM when back at my keyboard