Pennoni Panels: Is a Book Still a Book if Not a Book?

The printing press is considered one of the greatest innovations in literature – making documents and texts more easily reproduced and accessible. The physical book has been the dominant form for centuries. As digital books and audiobooks take hold, will the physical book be flushed out of existence, a remnant of what used to be? Or will it be able to maintain its place on the shelf? Does it matter?