Interesting video. It's true that old games do not look bad at all on modern screens, at least I don't think so. 1080p on a CRT doesn't even look that bad either. I think the lines across the screen give it a cool, retro feeling.
When playing old games some people go out of their way to enable CRT lines, they don't think it looks right without them. I vaguely remember gaming on a CRT, I had a big old tube TV when I was a kid. For me it's not needed but I do play old games in their native resolution so they don't look stretched.