If I move my cursor slowly I can see the difference, I guess? But I don't habitually do that - I run with mouse/trackpad dialled to maximum acceleration, even at 120Hz there's a skip when you flick the cursor halfway across the screen. And I'm rarely scrolling a line at a time, I'm going page at a time.

I don't really get the obsession with smooth movement for desktop use (as opposed to gaming). Possibly this is a generational thing? Why is anyone intentionally using a computer primarily via slow analogue inputs?