Well, this is a crazy contraption. The GScreen is a laptop that hides a secondary screen behind its main on, allowing you to slide it out and effectively double your screen real estate. Madness!
Of course, tossing a second screen on board adds a lot of weight, with the 15.4-inch model clocking in at over 12 pounds. But you'll be able to use dual screens on a laptop! It's not available yet, but the plan is to sell these guys through Amazon by this December, with the first units sporting 16 or 17-inch screens. And they'll definitely be expensive. But wow, look at that thing!