I like the idea of having the screen pull out link window blinds myself. Need a bigger screen for something? pull it further. Don't need a big one to read on

I like the idea of having the screen pull out link window blinds myself. Need a bigger screen for something? pull it further. Don't need a big one to read on the bus? pull it out a little. it would even give you a convineint place as a manufacturer to put the batteries, and mount the control hardware for it. It ought to be even fairly trivial to determine how much of the screen is pulled out and adjust the display accordingly.