I'm afraid that they're going to phase out physical books though because of online competition and easy downloading of digital copies. What happens when the older generations that prefer physical books die off and there's only the digital generations left that hardly even know what a book is? It's a distinct possibility in my opinion. The Encyclopedia Britannica has already stopped producing the print version of their books. Now granted their books are gigantic, not very user friendly compared to an online version, and kill a lot of trees, but it still seems like a sign of the times to me.
They stopped printing because the whole thing is extremely expensive, not nearly as up to date as things you can read online (and even if it was totally up to date when you buy it, it wouldn't be soon enough and you wouldn't want to buy everything all over again. And it's just slightly more accurate than Wikipedia.
Britanica was a bad fit for paper. I don't think that it not being printed anymore says anything about books disappearing.
And on the topic of disappearing, my favourite feature of the new books is that they don't have to go out of print anymore. They can always be downloaded (or pirated if the publisher is clueless and stops selling them) and for physical books we have print-on-demand which means that the book doesn't have to be printed until you order it (meaning you don't have to make a print run of thousands if you aren't sure to sell them all anymore).