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Frankly I can see some university profs going this route if they can work out getting the royalties they enjoy form teaching from the textbooks they author. It was my experience back in the old old days before even pagers were invented and handheld calculators went for $100 or more that profs made a lot of their money publishing. Making frequent, or specifically annual, re-writes got them guaranteed royalties on their mandated text books.
I would enjoy not having to carry a collection of books but I would also figure on needing more than one reader. Murphy's law being what it is, you KNOW that the text you need for tomorrows critical exam will be on the reader that just went belly up into electron heaven. That and batteries will be an issue. It was very unpleasant to have my spiffy and necessary expensive calculator go dead in the middle of the mid term statistics exam. Fortunately the prof loaned me his, minus the answers darnit.
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