Upgrade with 120 v 80 Hz OLED: Much More Visible than 60 v 120 Even for Office

Any GPU, even on-board, made in the last 10 years is capable of rendering a 4K desktop at a full 60hz without a problem. Anything on-board or discreet that is currently sold on the market, even absolute budget tier, is capable of pushing somewhat beyond that, even the dinky little GPU clusters AMD put on their Ryzens. Just about any half-decent cable you buy on Amazon will work, too. So none of this is particularly unobtainable.

It also does make a difference, I've been running high refresh rates since the 90s, it makes it easier to track the cursor, reduces input latency and improves motion clarity whenever you're scrolling or dragging things around.