OK, you are misinformed here a bit i'm afraid. As for actual PC games, just set the resolution of the game to 1440p, problem solved. You are right of course that playing lower resolution content than your native screen resolution will look a little blurry, thats just what happens when you stretch a lower resolution image to a higher resolution. It's a PC though, so just set the PC and games to 1440p. As for refresh rate, you wont need to touch that, just set it to what the monitor supports and call it a day, games that were 60Hz, will just still play at 60Hz. The refresh rate of the monitor is a target and as fast as it will go, but it will happily do any refresh rate below that if its a Gsync/Freesync.