Slightly OT - Yesterday, I tested a movie from the usb port of my Sony 3DTV for the first time since I bought it and to my surprise it automatically detected the movie to be stereo and switched to 3D mode. The movie was a half sbs mp4 clip as mkv is not supported. So it has no detection tags. I wonder how the TV recognized the movie to be stereo? Resolution? Can we incorporate this in xbmc so that we don't need to specify any type of 3d tags?