>>272902259
From what I understand, freesync just makes it possible to drive a monitor's refresh rate at below its max framerate, for when your gpu is struggling to provide frames at a full 60fps (or more). VR headsets have to run at a full 80/90+ fps all the time to prevent motion sickness, so they instead have the driver synthesize frames in-between what the game is producing, e.g. every other frame. Slowing down the refresh rate with freesync would probably just be worse.