I don't think this is how it works. The technique is for when you have X fps content and Y fps capable monitor, where Y > X. In games, you'll still render at y

I don't think this is how it works. The technique is for when you have X fps content and Y fps capable monitor, where Y > X. In games, you'll still render at your old FPS cap, but this shader is for relatively cheaply generating extra frames that will make the content look smoother / sharper.