For several years, we've had the opportunity to read electronic books.  It's something I never thought I'd do, but I've discovered that I enjoy them as much as printed book, and sometimes even more.  Thanks to major markets such as Amazon, Barnes & Noble, and Apple, the three largest ebook retailers, digital sales have skyrocketed.  
This is a good thing.  Any time we can make it easier for people to purchase and read books is a plus.  Reading is good for the mind....