Maybe I need glasses?

Mosdef

Yeah, I can definitely tell the difference between 720p and 1080p, but the difference isn't so large as to make me use it everywhere, so I default to 720p unless I need a bit more definition (usually for text).

My TV is 4k but I can't remember the last time I actually displayed 4k content, almost everything we have is old DVDs (so 480p?) and 1080p Blurays. I don't see the point in paying extra for Ultra HD when the picture isn't that much better at our viewing distance.

I'm pretty much in the same boat, 720p looks fine to me in the vast majority of cases, and while I'm not great at going to my eye doctor regularly, the last time I had my vision checked it was fine, and it was right around the time I was shopping for a new TV and upgraded from 1080 to 4k, and still had a 720p in my bedroom.

If I looked really hard at them, I could tell the difference from the 720 to the 4k, but truth be told, I'm just not scrutinizing the picture quality of my TV that much.

I was like that too before I got glasses (I knew I had vision issues, but not how severe it was). I can't stand 720p anymore.

If you haven't been tested, or are a couple years overdue, yeah probably. If you put a new 4k TV (with an actual 4k video, not Netflix) side by side with you current one, you'd notice. Especially if it's OLED, because they can turn off the emitters to make blacks actually black.