As the article said, you see chopping because the images are sharp. Imagine if your eye only worked at 10fps. You'd still see the difference between 30 and 60 b

As the article said, you see chopping because the images are sharp. Imagine if your eye only worked at 10fps. You'd still see the difference between 30 and 60 because moving objects would chop even after averaging over 3 or 6 frames. It's just that the difference between the frames would be smaller at higher fps, so eventually they are too close to notice and you effectively get motion blur. If the game rendered at 30fps but with motion blurring to account for 1/30s of motion, and at 60fps to account for 1/60s of motion, I predict it would be very difficult to tell the difference.