I'd ask you to get a 1080p monitor if all you're going to do is 1080p gaming. Yes you can game on a 4K display at 1080p but the pixelation in itself will want you to either go for a smaller display(1080p res) or up your hardware specs so you can game at 4K). The latter option is expensive, which is why I'm suggesting to stick to 1080p displays.