Someday we will have 3d molecular memory that stores exabytes or even a lot more, ofcource it wont happen soon but it is theoreticaly possible so it will happen.
Anyways the real reason for this post is im wondering what a holographic display actualy is?
They show some floating images in movies sometimes but that doesnt explain much, how does the image actualy get there? Is there some hardware always in the viewangle of the image you see?
I read it has something to do with interference? But i dont know what that is so it doesnt help me much
So can someone give me some basic explanation please?
Personaly, think multidirectional pixels would be a good way for 3d displays.
Ofcource with static pixels you would need very high res pixels wich means the subpixels would have to be to small, atoms just arent small anough.
But i think it could be done eventualy with low res pixels that can change direction angle about a few pixels vertical and horizontal.
Cameras would track the eyes 3d possition and the pixels would be alined so there is never more than one eye in the same subpixel.
All subpixels an eye is looking in would have their color calculated based on the exact possition of the eye meaning you have analog directional resolution, as the eye moves in the angles the pixels would move with them until you have moved 1angle pixel width and then it would switch back one pixel width so youre in the next subpixel.
All subpixels without eyes in them would display the average color of that angle range.
This way it would seem as if the environment you see is realy behind the display, for example if a flashlight would be aimed in your room it would light up the room exactly like it would when it was realy there.
For it to be realistic with a sun shining trough the hole in your room you would need very high brightness pixels ofcource but this might be possible in the future.
With the eye tracking cameras i actualy have very small ones in mind that would be even smaller than the pixels, there could be thousands or millions low res cameras in the display that would have a very high combined level of detail.
From those cameras a high detail 3dimensional representation of the room could be calculated and your room would also light up the virtual world so you could also shine flashlights into the environment, you could also see someone elses room trough the hole.
I think if the pixels are small anough even your focus on objects at different distances could be completely realistic.
I think this would be better than the holographic displays ive seen in movies since those always are transparent, i think it would be very nice to have a 5x2.5 meter display like this in your house
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I think this will probably require advanced molecular assembly, so its not for the near future
It would also require petaflop computers to have optimal quality so it would have to wait for that anyways.
