It's weird because TV is also culture. Game of Thrones isn't just some random piece of personal, single-player entertainment: it was, and is, an important cultural phenomenon for at least half of the planet.

That's what makes the dynamics so weird: it's not just, or even primarily, about your personal entertainment - there are social aspects involved, from wanting to belong with your peer group (e.g. talk about latest GoT episode with your cow-orkers at the water cooler), to all kinds of rituals (e.g. watching romantic comedies with a date/spouse).

Same applies to books and musics, to a lesser degree to magazines/news media. For some reason, it mostly doesn't apply to videogames; I used to think it was because they're a new thing, but these days, I think it's rather because the experience is much more individualized and requires much more effort (and time), making it a poor social object.