I watch very little TV, much less than when I was a kid in the 1950s & 60s. Mostly I watch educational, news, movies, with a lamentable weakness for reality cop shows and "World's Dumbest" kinda stuff. I haven't seen a network sitcom or drama in months, don't even know most of the current ones I hear being discussed online.
I have a 27" iMac computer, with a satellite TV adapter. The TV programs appear in a small window among my other online stuff on the screen, like RJ in a browser window (though the TV feed can go full-screen when I wish). If it's something I really want to see in HD I join my partner in our bedroom with the large new flat screen I bought us (really mainly for his enjoyment, I almost never watch it by myself).
I find it odd, because one of my degrees is in TV & Radio Broadcasting, and I really used to be into that. But I suppose Army service weaned me away from it, at times not seeing a TV for weeks on end. And despite having several hundred satellite channels available to us now, versus the mere 9 or so we had when I was a kid, I find most of them boring.