I really like the mathematical simplicity of the work in Weiss '99, and I think it could be an interesting foundation of a practical algorithm. I don't like how they seem to imply that it works great all by itself, by showing pictures of baseball players neatly segmented out of their background. I'm suspicious of something so mathematically simple corresponding so closely to the qualitative human perception of an object. I don't know if this was on purpose, but I think they should have spent more time emphasizing what you can do with such segmented results. I haven't seen the results on motion, but that seems like it could be good by itself. Also, I think using this segmentation in sort of a super-pixel way could give some cool results for other algorithms.