Microsoft today unveiled the successors to its Surface line of tablets, announcing both the Surface 2 and the Surface Pro 2. The Surface 2 is an upgrade to the existing Surface RT tablet and includes a Tegra 4 processor, a 1920 x 1080 resolution, and 25 percent better battery life. The Surface 2 is both thinner and lighter than the original Surface RT, retaining the adjustable kickstand. Instead of USB 2.0 ports it uses USB 3.0, and includes Microsoft's full Office software (adding Outlook). Microsoft's Surface Pro 2, the next iteration of its existing Surface Pro tablet, is equipped with an Intel Haswell processor that boosts graphics performance by 50 percent and battery life by 75 percent. Overall performance is said to be u