" The Janus particle has made reading e-books much more like the experience of reading a physical book, at least in terms of the appearance of the words on the page. It could yet be the future of the written word. However, it is unlikely that electronic paper will completely supplant books while it lacks paper's distinctive smell, feel, and sound, since it is this multisensual physicality of reading that is one of its great attractions. People love books, more perhaps than they love the written word. They use them as a way to define who they are and to provide physical evidence of their values. Books on shelves and on tables are a kind of internal marketing exercise, reminding us who we are and who we want to be. We are physical beings so it perhaps makes sense for us to identify and express our values using physical objects, which we like to touch and smell as well as read. "

― Mark Miodownik , Stuff Matters: Exploring the Marvelous Materials That Shape Our Man-Made World