Smart Paper is Lenovo's 10.3-inch E-Ink tablet. It's running Android 11 and will cost $400 when it's available later in 2023. And it's not just about the great E-Ink battery life. Smart Paper is all about writing and note-taking, too, with nine options for the stylus, from pencils (wooden and mechanical), to markers, pens, and even calligraphy.