Sometimes I watch older stuff and go "man, that looks horrible"
It's funny the way we get so used to HD.
Also funny, conversely, the first time I saw something in HD I was floored with the quality. I can remember radio ads for HD; the guy said something like "I was watching football and you could actually see individual blades of grass"
Now you can't even buy a TV that isn't HD. Heck, last one we bought had to be 4K because that's all they had in the store