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Just had a flash. Maybe it's something someone mentioned before that just surfaced in my subconscious but here it is.
A series of tiny playing card sized readers with no surrounding bezels. You put all of them next to one another, set one as master and they all work together via wifi to become a bigger display. You buy them as you need and clip them together to perform the task at hand. When you're done, put them back in their own pockets.
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