The publishers’ dream of creating content once and having it run everywhere is just that, a dream. We will all be nostalgic for Microsoft soon, which for about a decade or two essentially developed and controlled a standard for all computing. Those days are gone. There will be some publishers who will develop products for all available platforms (at great expense) and others who will focus on one platform alone (giving up a big piece of the market). But these are difficult days for publishers because platform wars have come to the book business.