Images you've linked to exhibit 'blended' pixel edges I am talking about. Also, top of the line monitors were not those Wells Gardner and similar monitors in arcade cabinets. Top of the line CRTs were/are broadcast reference monitors by SONY and to a lesser extent JVC and others. I have a BVM-20F1E. It looks better, sharper, than regular CRTs (mostly due to high line number) but it exhibits same 'effect'.
I have a theory what contributes to that 'blended' effect. Well, at least for the most part. It's the masking in-front of the beam. If you look at the sister comment here I made with portable AGS-101 screen from Gameboy SP, it's the same effect. Most prominent while moving. That (resolution) masking grid (with squares on LCD or oblongs on CRTs) somehow interacts with neighbouring pixels and blends all together. It's not from the composite signal, that's for sure. I know, because I run my consoles with RGB output and I still don't see that sharp look that doesn't look right.
I have a theory what contributes to that 'blended' effect. Well, at least for the most part. It's the masking in-front of the beam. If you look at the sister comment here I made with portable AGS-101 screen from Gameboy SP, it's the same effect. Most prominent while moving. That (resolution) masking grid (with squares on LCD or oblongs on CRTs) somehow interacts with neighbouring pixels and blends all together. It's not from the composite signal, that's for sure. I know, because I run my consoles with RGB output and I still don't see that sharp look that doesn't look right.