Microsoft Corp. (NASDAQ:MSFT): Microsoft has released its updated Surface 2, its new RT tablet. The refreshed unit offers a better display than the Surface RT (1080p, versus 1366×768), a revamped kickstand, improved battery life (Microsoft promises a 25 percent improvement), and an Nvidia Tegra 4 CPU, up from the RT’s Tegra 3. The Surface 2 will start at $449, the Pro 2 will start at $899. Microsoft also announced today there are now 100K apps in the Windows Store, up from 10K a year ago. The Windows Store covers both Window 8 and RT apps.