system
A chat on subreddit /r/pcmasterrace
human
It’s about half way in between. But because your brain is a great image processor it looks way better than half way in between. 

Especially in games, where pixel colors and brightness is flipping around a lot and antialiasing can’t solve it properly.
gpt
It’s closer to 1080p

Especially when comparing 24” 1080p to 27” 1440p. 

4K is a much bigger jump. 

1440p is not halfway like people think it is.