People saying they don't bother with AA at 4K always means they're compromising, have a relatively small monitor or need glasses. I've had the same monitor from 295x2 quadfire, 980TI SLI, Titan XP SLI and 1080ti SLI and can honestly say that regardless of fps upping AA has been responsible for the biggest visual improvement. Yes FPS have improved but visually increasing the quality settings and that only means AA in this context is what has made the difference. Same game, same fps but waaaay prettier. If that hadn't happened I'd have stuck with the first 1080ti after selling the Titans and not bought the second for SLI but I got annoyed I was going backwards in my gaming experience. Its all about what you get used to and or will accept.