Judging by what I can see on the film clip and website, I can't see any reason why this couldn't be purchased as a spare part and used on any other Dyson with click-fit tools. It uses exactly the same fitting as every other attachment they currently produce.
First thing that crossed my mind was, how much will this cost? It's a Dyson hand vac like any other, only with a glorified Swiffer head on the end. But it has been "engineered", so will probably be well over the £200 mark...