AR is also much, much harder. Refresh rate doesn't just have to fool your brain, it needs to "stick" to reality. Plus, you're adding environment tracking and in

AR is also much, much harder. Refresh rate doesn't just have to fool your brain, it needs to "stick" to reality. Plus, you're adding environment tracking and integration. If you're using a glasses model, the only techniques I've heard of darken the environment and the CG element lightens things--this makes integration difficult. I imagine you could use some tricks if you did AR with cameras pointing out and displayed them on a screen (this seems to be what the parent is implying), but you go back to "failure" being a black screen. In practice, I haven't seen this be a big deal. The display is black when it is off (like your phone assuming it doesn't put the screen to sleep). If any rendering misses a frame they distort the previous frame in the buffer to match any head movements (in AR likely reintegrate with new footage).