But you need a larger medium for technical books that are filled with diagrams, or if you ever want to read a pdf. Really you'd want a device in the shape of a

But you need a larger medium for technical books that are filled with diagrams, or if you ever want to read a pdf. Really you'd want a device in the shape of an A4 or US letter paper. Phones, especially 5"+ phones, are great for reading novels. I don't see the need for a dedicated device for ebooks that can be re-flowed accurately.