This is the game update loop, which excludes rendering. (for some reason people still use FPS which is confusing) I'm not aware of any displays like that, but

This is the game update loop, which excludes rendering. (for some reason people still use FPS which is confusing) I'm not aware of any displays like that, but if there were, you could optimize by eye tracking each viewer and only rendering the direction they're seeing it from. The "New 3DS" (note: different from the regular 3DS) did this.