I was originally trying to imply how retarded it is for MS to have so many different versions of the same OS. Why not just give us one OS that does what everyone needs and let the user disable the extra stuff if they find they don't like it.
Actually I find it a good Idea to create more versions sow the costumers doesn't have to pay to much for the little things they need and visa verse.
For Vista you can chose between:
Home Basic (I do have doubts about that one.)(Doesn't have the 3D flip function)
Home Premium (The first one that's actually good enough for an upgrade but I do have problems to share things with that OS)
Business (Name explains itself)
Enterprise (Don't know anything about that one)
Ultimate (The complete version of Vista but very expensive)
And I think I'm forgetting 1 but I don't know witch one