I know there is a lot of debate as to whether service design is not just IxD. I don't are (anymore). The reality is that even IxD is an emergent cross-disciplinary field that at earlier points in its history could be totally confused for previously existing design disciplines and engineering practices. But considering the size and breadth of this community with various affinities it is clear as Morpheus said, "We are here." That's sorta how I see Service Design (they need an abbreviation; is SD good enough? for now it will be).