This effort from Orkin Design has much in common with the D-roll in that both designs fold into an easy-to-carry tube when not in use. But unlike the D-roll, the Rolltop also lies flat for tablet use. The tube packs the power supply, a Webcam, USB ports, speakers, and an extendable power cord. A flexible OLED display, a screen keyboard, and a stylus (for tablet writing) round out the feature set. See the Rolltop in action.