Why I get low resolution screen?

Hi! When I run vanilla ExampleContent application, I get very odd result, like low res on wrong antialias (inside editor, after hitting play, before hitting play it looks way more crisp):

I updated all drivers for my GeForce 1070, made sure it has setting to give control to application.

Any idea, what else I forgot to check?

Sometimes it adjusts the scalability to Low, you have a 1070 so it should be fine, but you can adjust here: Scalability Reference | Unreal Engine Documentation

Oh! This is where they are, I was looking all the way elsewhere inside Editor settings. Thank you!