The document discusses the history and future of digital textbooks. It notes that over a decade ago, educators and publishers envisioned the "Future Textbook" as being more than just a printed book, incorporating interactive elements. Since then, ebooks and digital textbooks have grown significantly in popularity. The document outlines the stages of development for digital textbooks, from early experimentation to future standards. It also discusses increasing ebook and digital textbook sales, as well as activities in the academic community around adopting more digital content options.