I’m not sure what are you trying to say.that’s what I said originally though,no?
120 FPS alone, without 4K,still Needs 2.1 regardless. It’s technically possible but you need a 2.1 connection both ways so it requires you to just get a 48gbps cable unless all you’re even going to play is 1080p or 1440p up to 120. You’d lose any other features.
For example Series S is HDMI 2.1 and of your monitor or TV is HDMI 2.1 you just need a Premium cable so you will use the Serie S max resolution and refresh rate just fine (1440p 120Hz).
That is why it ships with a Premium and Series X with a Ultra cables... an Ultra cable should be overkill for Series S.
If that is what you said then yes you are correct... sorry if I made it look it was not.