Basically, the Surface RT would receive the Surface RT UEFI (v3.31.500) update that supposedly enhances overall system stability, while the Surface Pro ought to see its network connection stability improve, while functionality on WiFi networks using a hidden SSID has been enabled. As for the Surface Pro 3, do expect the Surface Pro Embedded Controller Firmware (v38.4.50.0) to deliver improved support for Surface Power Cover, while there is also the Surface Pro System Aggregator Firmware (v3.9.250.0) that offers better support for Surface Power Cover and enhances overall system stability, with Microsoft LifeCam Front (v5.20.1034.0) helping improve power consumption by a significant amount if you are involved in video chat apps like Skype, while supporting Flash camera streaming in Internet Explorer, among others.
How has your Patch Tuesday been as a Microsoft tablet owner?