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I think the e-book was revolutionary, perhaps comparable to the invention of the printing press. But I don't think the Kindle deserves the credit for it, and I say this as a Kindle user. It wasn't the first e-reader on the market, and this revolution would have taken place anyway. The last three on your are insignificant in comparison.
Wikipedia did transform encyclopedias, but I think that would have happened anyway. I think encyclopedias would have transitioned to being online anyway, but what Wikipedia did was make it free, and open to a much more vast array of subjects than encyclopedias would have had if they hadn't been free.
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