Books will never go out of style ....
The London-based Folio Society is publishing books which go for over $1,000 and they sell out rapidly. The Easton Press who publishes leather-bound classics among others, sells as much as they can produce. The used book market as exemplified by Biblio.com, alibris.com, and ABE.com are going strong. I myself am a collector of classics published from 1929 until the present by the American Limited Editions club.
There is a place for e-books: students who can't afford books, travelers who want to travel light with a Kindel. But the collecting of books has gone on from when Livy wrote on a scroll, and people will continue to buy and collect books. Last month, a first edition of Scott Fitzgerald's Tender is the Night sold for $11,200. There is no worry about technolgy making books obsolete.