Thing is, hips are centered higher than that. In the second picture, indeed, the "after" picture looks better, but I still think something looks off. I don't know, perhaps it'll make things better in some people, but is it -that- good?
If I were to look into such surgeries, I would definitely go for that thing where they take fat in one place and put it in another. Much more flexible than an implant with a fixed shape that you can't put anywhere. Besides, implants bring more complications, usually, don't they?