A good television interface is certainly still missing on Linux. Now you either choose Android TV (which doesn’t run nicely with x86), or Steam big screen (which is missing the more media parts). But with very powerful and affordable mini PCs that can play games and media (with latest codecs), it would be much more interesting to have a great user interface that combines media watching and gaming.
That's true, but switching between all these 10ft UIs (Kodi, Steam for local games, Steam Link because its streaming client seems to be a lot less buggy than Steam's built-in one, browser for the stuff not covered above) is still kind of a mess.
If anything, things seem to have regressed slightly, since Steam removed the one good 10ft browser I'm aware of during the Steam Deck rollout.