Yes. You can play 1080p @ 144hz on a 2k monitor AND it'll look just fine. Well, at least I think it does. Beauty is in the eye of the beholder so... I recently bought myself a 32" 2k 144hz monitor and 1080p @ 144hz is no problem. Especially for your 2060 which is a lot better than my 1060. Keep in mind, it'll all depend on your in-game settings.