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So, I have one issue with this: "hard AR" already has to solve all the mentioned problems of video passthrough if it wants to make virtual objects seem lifelike: dynamic range, field of view, lag, all of it. If you somehow solve of them, which of course seems impossibly hard at present, then there's no point in worrying about see-through AR; just use video passthrough.

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He mentions some of the even harder problems to solve that are specific to video pass through mainly, the problem of having to focus exclusively on a screen closed to your eyes all the time which gets tiring fast.

Virtual retinal displays will be able to fix that; they display an image directly on the retina, using lasers, and will eventually be able to have a range of focal depths in a single scene.

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