I feel like Kodi mediacenter app is one of the main things to consider putting on it. Like, booting some Linux and instantly launchung it, so it's UI is the main UI for user to interact with. It covers most TV usecases of mid 2010s and shines if you have a medialibrary on the network.
But it doesn't cover occasional web browsing, DRMed videostreaming platforms with their own apps, etc. Worse than that, if we don't limit it to just Kodi, we'd need some UI to pick apps, swtich apps, etc, and if that's critical, it's probably worth it to rip an image of some WebOS, like on LG TVs, or an Android fork like on SmartTV boxes/sticks, whatever is less combatative, and methodically carve out bloat and adware, forming an image of inherently insecure/outdated OS that has the UI thing working right.
Outside of SteamOS idk if Linux (not Android) had slick console/SmartTV-like DEs/system-wide GUIs. But since the problem is on the surface, I believe there are some who tried, or configured/themed their environment to act like it.
Not even that. A business can "implement" AI agent on their website by forwarding client's inputs to someone else's API, adding a prompt pointing back at them.
Control+W is a great symbolic combination. I press it, for I want control and it's a W to me.