this post was submitted on 31 Dec 2023
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The single use case I can think of are isometric games.
The use case I see is screens mounted on something that moves.
It's easy with accelerometers to know the orientation, so you can display things on something that in its whole or has parts that move in an additive way.
Imagine an movie screening with the screen mounted on a float in the ocean.
The float moves with the waves. You can stabilize the image of the movie to be still while the screen itself tilts.
Something like this, but then with a direct screen instead of a projected one.
Another use case would be applying this to smartwatches or other displays like that.
You could make the output of the screen always be perfectly aligned with your line of sight rather than have it tilted at an angle parallel with your arm.
Knowing how big Linux is in embedded systems I almost wonder if it was originally implemented for some kind of full-motion simulator since that could easily call for very funky display mounting