Silly, but still funny! If you rotate the Surface to portrait mode, I guess that picture is pretty accurate. Anyway, reading and typing regular correspondence is one such use. Letter documents are generally 8-1/2 inches by 11 inches. Portrait mode allows one to see a full page document, and to type away with more of the text visible. It's just nice having the luxury to switch between landscape and portrait mode, as needed, and not limit your options.