To say nothing of whether magic leap is real - when vr/ar technology catches up there's a trick to get around this. It should be possible to track gaze precisely and only render the high resolution 'fovea' at high detail. The rest can be very low res and nobody would know. This will probably be important in graphics and gaming first though, where they can focus all of the gigaflops on sampling illumination raycasts in the most sensitive area of vision. It's actually pretty wasteful to render an entire UHD monitor at full resolution when the eye can't even discern a word at one end of a sentence when the fovea is focused on the other.