The kickstand is a unique Surface feature; it allows the tablet to stand up without the use of a separate case or dock. However, many people complain that it makes for awkward use when in "laptop mode" (with the keyboard attachment).
The game section in the Windows app store is weak so far, but you can install and run games on the Pro from Steam, GOG, and other sources; those latter options are unavailable on the RT version of the Surface.
The power brick and cable is thankfully small. That's good because at about 4 hours of battery life, you'll probably have to bring it with you. But the inclusion of a USB port for charging your phone takes some of the sting out.