Conceptually, the Microsoft Courier is pretty badass. The video above shows a faux walkthrough of using the device and the many ways it can be utilized. According to this article, it's actually more real than just a video concept - it's a real booklet device in the "late prototype" stages. Obviously the real deal may not be quite as great as the proposed interaction seen above but if it comes 95% close, it could be a real contender for Awesome Future Device of the Year.