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I think the niche for the roll-out screen will be as a novelty item, e.g. a pen that rolls out to a paperback page size. Do you want to hold the scroll with both hands to keep it straight? Maybe we will have a telescopic support that locks the roll-out screen into a rigid page.
But what then of the paperback-sized screen we want to roll-out in two dimensions to create an A4 sized screen? How is the screen folded to begin with? There are some conceptual problems here that may make the two dimensional roll-out impractical.
I would like a pen that becomes a book. Maybe as a low-end device it could be very cheap, once eInk itself comes down in price.
Whatever happened to the heads-up display that could appear to be a four foot screen out in front of us? Now that would be a portable reader!
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