4k here mainly playing csgo and it's not bad. However, having played on a 1440p 144hz monitor, I'd say it's better for fps games. The higher refresh rate creates a completely different feel. It almost makes you feel like you're better at aiming than you are. Some older games also have lousy UI scaling meaning that some UIs are tiny at 4k resolution, so keep that in mind if you're planning to play older titles.