According to a report from Digital Trends is giving future Surface owners some gaming news today, where they're reported that the upcoming tablet from Microsoft will support wired Xbox 360 controllers.
The report comes from a recent AmA (Ask Me Anything) on Reddit, where Surface general manager Panos Panay was asked "Does the Surface support Kinect and/or 360 usb controller inputs?", he replied with:
We used the 360 usb controllers to play with Surface all the time and they work great. We have not tried Kinect yet.
While the Surface will support Xbox 360 controllers, it is only of the wired variety. The USB Xbox 360 controller will work on Surface, just like they work on Windows PCs.