Hanwah Japan presents the Duo for laptop digiital pen that converts your ordinary notebook into a tablet PC. Simply place the receiver on top of your screen for capturing movement using InfraRed and Ultrasonic technology, then you get display with touch input.
The Duo for Laptop, however, works with only 15.4-inch LCD display. It has a resolution of 600dpi. The price is 9980 Yen.