HP Developed a new system, called IonTouch, which enables cheap and easy "paperless" printing. The basic idea is that IonTouch can be used to "print" small displays for applications such as calling cards, QR Codes, badges and more.
Those cards are based on E Ink, and so does not require any power while the image stays - and of course the image can be changed with the "printing" equipment. Each display is a 2.5" 300x300 monochrome (16 grayscales) E Ink panel. HP is aiming for a low-cost solution and each display will cost less than $2 to make.