LCD glasses that "darkened" at specific points do have the problem that those spots would be blurry, yes.
But if the spots are big enough, then they will create solid block spots at their middle. And the display can then "fill in" the darkened blurry spot proportionally with the "same" pixels from the camera, altering the ones it wants.
It would look bizarre for people looking at the person wearing the glasses, with strange black dots flitting across their glasses... And the syncing would have to be perfect (very difficult).
But it's an engineering issue, not a fundamentally physical one.
The time cost of signalling and unit computation is fundamentally physical. Drift and error in inertial and position sensing is fundamentally physical.
You can make very good goggles if the money and time per unit isn't an issue. Registration to the point that there are no detectable flaws is very hard. You have a hard timing constraint from the human visual system on the order of 5 to 50 milliseconds. In that time, you need to sense the visual environment, determine position and its derivative vectors, figure out how your simulation needs to be updated, render the new data, and display it to the user.
Not something you can necessarily solve by throwing money and engineering hours at it until it works. In fact, there may be a few Nobel prizes in physics between here and there, or possibly biological integration well beyond our current horizon.
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On drawing black:
LCD glasses that "darkened" at specific points do have the problem that those spots would be blurry, yes.
But if the spots are big enough, then they will create solid block spots at their middle. And the display can then "fill in" the darkened blurry spot proportionally with the "same" pixels from the camera, altering the ones it wants.
It would look bizarre for people looking at the person wearing the glasses, with strange black dots flitting across their glasses... And the syncing would have to be perfect (very difficult).
But it's an engineering issue, not a fundamentally physical one.
The time cost of signalling and unit computation is fundamentally physical. Drift and error in inertial and position sensing is fundamentally physical.
You can make very good goggles if the money and time per unit isn't an issue. Registration to the point that there are no detectable flaws is very hard. You have a hard timing constraint from the human visual system on the order of 5 to 50 milliseconds. In that time, you need to sense the visual environment, determine position and its derivative vectors, figure out how your simulation needs to be updated, render the new data, and display it to the user.
Not something you can necessarily solve by throwing money and engineering hours at it until it works. In fact, there may be a few Nobel prizes in physics between here and there, or possibly biological integration well beyond our current horizon.