rationalskepticism.org

I think the distinction is largely an artifact of the level of research carried out with carbon chemistry relative to the rest. Carbon chemistry is known in much greater detail, and typically deals with large and complex molecules. In contrast, "inorganic" chemistry typically focusses on simple systems and small molecules - you rarely see anything about someone making an inorganic molecule that looks like this, for instance:



However, in a couple of hundred years time when the largely unexplored region of more complex inorganic compounds has been mapped out, I imagine that there will be less of a need for a distinction between the two.