The document discusses the evolution of reading over time through various technological innovations from 1850 to the present. It explores how each new medium from newspapers to movies to computers changed expectations of what reading entails and how text can be experienced. While e-books brought changes, they have not revolutionized reading like prior innovations. The most important expectations for reading involve quantity of content available rather than qualitative aspects of the reading experience. Constraints that initially seem limiting can become freeing over time as new standards and skills develop.