The original Microsoft Surface Pro promised to be a game-changer, offering all the power of a PC in the compact, lightweight form factor of a tablet. Unfortunately, Microsoft's first foray into the world of tablet computing proved to be half-baked. Although it was as speedy as many Ultrabooks, this slate was marred by a dismally short battery life. Now, the Surface Pro 2 has arrived, and with it an improved battery, faster performance and expanded storage. Is it finally time to say goodbye to your laptop?