Shopping for electronic books is simple. Too simple. Most of us just visit an online retailer, like Amazon or Apple or Barnes & Noble, and stock up on digital literature. It’s painless — cheaper than a trip to a brick-and-mortar store, and much too limited.
Compare that to the online movie business. You can buy a digital copy of the film, but you can also rent it for a day or two, or get a $7.99 monthly subscription to Netflix and stream it over the Internet whenever you like.