I bought a TV hat for one of my Raspberry Pi 3B+. I connected it to my TV antenna on the roof, installed tvheadend (and cursed a little bit the UX but it's mostly a do it once and forget thing), installed TVH Client on my phone and tablet. I ended up with smart devices that can do everything a smart TV can do except that I can bring them around my home and garden (a plus) and have a smaller screen and sometimes worse audio (cons). I don't have ads unless I'm watching free to air TV, because of Blockada. It works as a radio too because basically every radio is also on DVBT here. I'm using VLC as player so I can do popup player (over any app) or play as audio and turn off the screen. If I want a larger screen and I'm in the living room I can turn on my TV. I'm not doing it very often even when I'm in the living room. A 10" tablet at an arm lenght is not much smaller than a TV far away on the wall.