The article left me scratching my head regarding what actually is considered an ebook app... One of the people in the article claimed that the 'apps' were usually epubs or pdfs... and that they were licensing xml (Which would be kind of tough since they don't own xml.. they must mean a custom xml format). Ultimately though none of those formats can work without a program capable of reading them... So when they talk about e-book apps, it must include such an application specific to the book.
In any case, my general thoughts on the matter is, that custom e-book apps make sense when we are talking about reference works or other specialty books that are not generally designed to be read through. Encyclopedias, dictionaries, technical references all would probably be best served by applications designed especially to suit them. I expect in the future ebook readers might well be able to handle books like those which really can have rather dynamic content. For novels though? No, just regular epub is fine.
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Bill
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