For comparison, the MacBook Air has about 2-3mm of usable space in the lid for optics + sensor. The iPhone has something like 7 or 8mm. For lens design and the

For comparison, the MacBook Air has about 2-3mm of usable space in the lid for optics + sensor. The iPhone has something like 7 or 8mm. For lens design and the ability to have a very slightly larger sensor, that's a huge difference.