I bought a mini PC and plugged it into the TV. I use a “wireless mini keyboard with trackpad” to control it. My husband and I have been using it for years. Beelink’s mini Ryzen PCs are quite solid in my experience. I have Linux on mine. Firefox with ublock origin. No ads, like ever.
Actually, I already do that. I have two two steam deck docks, one in the living room and one in the office. I still like having the dedicated device for streaming though. Especially since I tend to download movies/shows sometimes. Can’t be filling up the steam deck storage with non-games!
I also sometimes use the deck in handheld mode while my husband watches TV.