We can't say if there's an actual rule or not, but we're pretty sure that anyone in the e-reader business
has to, at one point, make a prediction about when e-books will overtake actual books, and it looks like Sony has now come through with a big one of its own. That comes courtesy of Sony's Steve Haber, the man responsible for the company's digital reading business division, who says that: "within five years there will be more digital content sold than physical content." Note that he says "digital content," not books, so we can presume that also includes magazines and newspapers, but it's still a fairly ambitious statement nonetheless. What's more, Habar also insists that there is a place for standalone e-readers alongside multi-function devices like the iPad, saying that, "it's just like digital imaging, where you can take pictures with a cellphone - and many people take pictures with cellphones - but if they want the best possible picture they'll use a point-and-shoot camera or a digital SLR."