Laptop screens are small. Desktop monitors aren't portable. Using the two together is a constant tug o' war between portability and screen size. Not with the Toshiba 14-inch Mobile Monitor though. It's a portable, USB-powered monitor.
The Gadget: The previously Korea-only 7-inch plug-and-play Mimo display, which hooks up via any USB 2.0 port. The resolution is a not-too-shabby 800x480, and higher versions, like this UM-750 also has a webcam and touchscreen.