There's nothing magical about it........
........If you want great images from f/1.2 to f/2.8, the 50L is the only lens that will do it.
Daniel, as much as I respect you as a person and a photographer (and I do) that photo proves nothing. The 50 f/1.4 for all we know could have taken the exact same photo. If I shoot out in daylight at low ISO on a 1Ds3 or 5D3, my photos from the two lenses are exactly the same. There is no $1100 difference. I'll agree with you that the 50L lens is sharper 1.2 to 2, but beyond that it isn't. Low to mid ISO the 1.4 lens performs just as well, which is why everyone is questionning the price. Most pros that I know prefer the 24-70L zoom lens over any of Canon's 50's. I personally like 50mm, so I own all 3, but I'll be the first to admit the 50L was way overpriced. I will probably keep it because I like the build quality.