In what's available to see, if you look closely at the size relationship between the headphone jack and the device itself, the screens are not much bigger than 4" high.
A plus for two screens; you don't need a jacket because the screens close together thus protecting them. And doing it this way you could have your text on one side and a dictionnary on the other. Or a touch screen on one side to take notes associated to the other side's text...
Open your minds here, other possibilities could exist. My computer has two screens. When I do graphics work such as CAD or photo retouching, I have my drawing or picture on one screen and all open tools on the other. I also often have Word on one side and a pdf on the other.