I think the comments you received do a fair job of summing up the results of this image. I'm in agreement with those who think it should be tack sharp. Soft focus could be good, but this one isn't sharp enough to get away with that. The idea and composition are both excellent. I like the curves and abstract nature of the image. I think this theme also calls for some more dramatic light and some more contrast in the image. In my opinion, this type of image does very well as either a high key study or a high contrast study. Both may be worth exploring on your part :)
I think for this to really work, the focus needs to be tack sharp. As it is, the blur just kind of makes you think of a snapshot. It has potential to be really artful.