(NYT) Only a few years ago, culture was delivered in discrete doses. "The 4-Hour Chef" would have been in the chain bookstores by the stacks and in independents by the handful. You wanted a book, you went to the bookstore. Simple.
Now the technology overlords - Amazon, Google and Apple - are competing among themselves and with other players to control how the culture is consumed. Amazon's Kindle Fire was introduced last year to carve out some space from Apple's iPad; since then, Google and Microsoft have brought out their own tablets.
There is constant jockeying for position. Amazon, for instance, is at odds with Wal-Mart and Target, both of which have stopped selling the Kindle, worried that it is a Trojan horse that will lure their customers away.