From here.
We just need simple editions and you still want to confuse everyone? So there’ll still be Windows 7 Enterprise, Home Basic, Starter Edition, Ultimate on top of the what you call STREAMLINE product lineup of 2 PRIMARY edition of Windows 7 Home Premium and Windows 7 Professional.
That’s just as confusing and as waste time as Windows Vista in naming conventions. Can we have simply, WIndows 7 Ultimate, Home and Business. FULLSTOP. 3 Editions, simple!