Earlier quoted context omitted.
The Magic Leap headset already uses essentially an LCD layer to add per pixel shading to add darkness. Even still, modern displays are so so good that an additive display is a massive step down.
Hard edged, per-pixel light blocking is impossible for the foreseeable future. What's possible today, and what Magic Leap has, is diffuse dimming of large areas of the display. The problem with light blocking is that when the blocker is millimeters from your eye it is completely out of focus. Unlike for the display, you can't use optics to make it appear farther away and in focus because the direction of the light it…
Forcing the industry to redesign visuals for additive displays is a huge uphill battle.