At current, the world of technology, online social network, I can see tablet on yours hand and everyone. But you forget impact of tablet? In my opinion a textbooks shouldn't be replace by tablet because It have impact eye strain, the development of children and electronic waste
First ,I think a tablet is the main reason. According to research of Bangkok Hospital-found that blue light of the tablet screen make your eyes strain. When stare at tablet screen for a long time and if you have to continue to stare at tablet screen. Maybe it's that you need glasses or worse, may be blind.
Next ,the children don't development muscles. In children 1-5 years must development muscles by molding clay, handle a pencil to write. Tablet it reason don't development muscles