I've had the privilege of using a merely 90Hz display and the difference is still incredible. It gives me input feedback much faster so my brain does not have to do as much buffering/prediction, everything feels a lot more direct. One would think a measly 5 milliseconds wouldn't amount to much, but for input feedback it absolutely does.

I do not suffer from nausea or motion sickness of any kind arising from computers or visuals in general, but I can still easily tell the difference between a 60Hz and 90Hz display. A few months ago I had the privilege of checking out the 120Hz displays on the new MacBooks and they're amazing.

I'd still say that draggin a window would count as a "simulated fluid motion". Maybe not something you'd immediatly think of, but its still trying to convey the sense of motion. Just text appearing and dissappearing isn't something I personally could categorize ass the same type of animation.

And I also count myself as someone who considers 120 at least necessary (on the primary monitor)