Check it out, SNES8X is released for Windows RT today and it's free! No xbox controller support just yet, but it runs great! However touch screen controls do cause games to lag, but they work fine with the keyboard!
[Windows Store Link]
More information with a video: SNES Games on Windows RT Now Playable Courtesy of SNES8x | Windows RT App Review
[Windows Store Link]
More information with a video: SNES Games on Windows RT Now Playable Courtesy of SNES8x | Windows RT App Review