I can see examples of where these epub3 features might be useful, like in a textbook where it's demonstrating something that might occur in a lab experiment, or animation to elaborate on a point, but I don't believe the average book will be well served by any of the ideas in the articles. If I thought there would be any possiblity of the ebooks phoning home to the publisher and/or downloading and displaying ads from either the retailer or publisher, I would never enable the wifi, ever. I'd also probably strip the DRM and clean out the javascript and css. I find the idea of a twitter feed embedded in my book appalling, and when I want to look up a map when I'm reading a book, I'll do it myself, thank you very much.
I find it especially upsetting at how excited Rick Johson, CTO of VitalSource got over the prospect of live advertising in ebooks.
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