Sure, but if that's the limitation we're assuming, I feel like endless electronic BOOKS is just as inconceivable. It's a useful, everyday item, so I can see why books would be a good choice for a fancy upgrade (especially since your audience clearly likes reading). But why not mail? It's even a similar category of item. And I thought there were other information networks that existed? I don't remember; it's been too long since I read it.

My point was, the books SPECIFICALLY were the reason I found the physical mail out of place. But that's also the point of the future: we have no idea what is going to be redesigned and suddenly, magically, be totally different.