Physical books maintain a UI advantage for many kinds of works, which may outweigh their extra storage burden and lack of full-text search. They compete worst (

Physical books maintain a UI advantage for many kinds of works, which may outweigh their extra storage burden and lack of full-text search. They compete worst (in fact they lose, probably, overall) for ordinary fiction, and other works that use few text features and are mostly linear prose. In favor of ebooks, that category does happen to be a high percentage of all books sold.