I don't see the value in a "100% replacement for all books" for the same reason I don't see any value in "100% replacement for all cooking utensils" or most other things. I can do a lot of things with my favorite knife, but that doesn't mean it would be better with a can opener attached to it.
Obviously longer battery life would be fine, but I wouldn't trade any size or weight for it. A color screen would be fine but I wouldn't trade any contrast or battery life or additional expense for it. A stronger case would be fine but I wouldn't trade cost or weight for it, and so on. It's a great device for reading novels, papers, long blog posts that I send to it. My ipad is a great device for movies and magazines. My computer is a great device for doing research and copy/pasting code snippets and playing games. My radio is a great device for listening to music or news in the car. My TV is a great device for watching movies and shows.
That's a mere 6 devices that pretty well cover my information and media needs. Not too bad considering I use at least twice as many different tools to make dinner.
Obviously longer battery life would be fine, but I wouldn't trade any size or weight for it. A color screen would be fine but I wouldn't trade any contrast or battery life or additional expense for it. A stronger case would be fine but I wouldn't trade cost or weight for it, and so on. It's a great device for reading novels, papers, long blog posts that I send to it. My ipad is a great device for movies and magazines. My computer is a great device for doing research and copy/pasting code snippets and playing games. My radio is a great device for listening to music or news in the car. My TV is a great device for watching movies and shows.
That's a mere 6 devices that pretty well cover my information and media needs. Not too bad considering I use at least twice as many different tools to make dinner.