I find DVR content to often be 720p content upsampled to 1080. So for the final test, I get you a real 1080p BluRay Disc (BD).

Then I know.

Also you have folk watching a screen from less than 12 inches away picking out pixel flaws. I'm unsure if those folk can be helped. Sometimes you see them performing a frame by frame analysis of the movie. Heck of a way to watch a flick.
Bob