Yes Kobuk, there are a lot of crappy shows on nowadays, that's why people watch dvd's and blu-ray's, just like how you always say you do.
Also it's 2017, tv's have been a part of the Internet for a while now, people browse the Internet, buy things, rent movies on Netflix and Hulu, and play video games all on their tv. (*Is currently watching dr. who while writing this.)
Anyways, I think tv's start becoming a bit overwhelming above 70". I have a 50" and it's a nice size without overdoing it, seemingly a bit small during the day when the room is lit, but at night when it accounts for 90% of the light in the room it is more than big enough.
I'll probably get a 60" some day, but I can't imagine getting much bigger than that without a much bigger room to put it in, it would just be too much.