Wicked Cool Futuristic Roll-Up Screen (Thickness of a Human Hair!)

Sony has developed an ultra-thin, flexible OLED screen, capable of wrapping tightly around an object as narrow as a pencil (a diameter as small as 4mm, to be exact). The full-color display is 80-microns-thick (or 80 millionths of a meter- that's the size of a human hair!). 

What I want to know is... why can't the iPad roll around a pencil?

Do not miss the demonstration video below.