Well the benefit is most obvious for a competitive video gamer. Lets say they're having a sniper battle in a video game, the first to click will kill the other

Well the benefit is most obvious for a competitive video gamer. Lets say they're having a sniper battle in a video game, the first to click will kill the other player. Somebody with a 60hz monitor might have to wait 17ms for the enemies image to render on screen so they can react. Somebody with a 240hz monitor might only have to wait 4ms. When reaction times in a competitive game are around 150 to 200ms that's a pretty large swing. See this: https://www.youtube.com/watch?v=OX31kZbAXsA https://www.youtube.com/watch?v=OX31kZbAXsA This article is also interesting: https://danluu.com/input-lag/ https://danluu.com/input-lag/. Beyond that, I think latency has a significant performance impact on many human tasks, I know that humans in videoconferencing can detect extremely small differences in latency. Higher refresh rate I think outside of latency benefits does allow some things to be more easily perceived like text in motion which normally blurs.