Only benefit I've noticed is it's easier to read text and smooth-scroll at the same time. Otherwise it just makes mouse movements and rapid console vomiting look nice. It's really unnecessary for programming in my opinion, use the budget for more pixels.
The hedonic treadmill is getting brutal. Going up to a 4k/34" monitor was nice but it quickly became normal. The main effect was how bad it made 1440p/27" monitors!
