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I think it's important to remember how long it took to actually develop the eink readers we have now. It wasn't just a few short years for them to come out. It took a lot longer than that. People dream about a new technology long before it becomes practical. Humphrey Davy demonstrated the idea of electric light almost 80 yrs before Tom Edison worked out a practical light bulb (if memory serves) so why should we be surprised that it takes longer than we'd like for an innovation in a new technology?
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