David Jackson, director of marketing and planning at E Ink, holds the circuit board with an E Ink display from a Motorola cellular phone during an interview with Reuters at the company's headquarters in Cambridge, Massachusetts March 29, 2007. "Electronic paper" has long been hyped as the future of newspapers and books, but products like e-books have been slow to take off. That may soon change, say executives involved in the pioneering technology. Picture taken March 29, 2007. REUTERS/Brian Snyder (UNITED STATES)