Jeopardy is an information retrieval problem in a game show format, with the minor twist that the query is phrased as a declarative sentence and the response is phrased as an interrogative one.

AI is not simply things that a computer can't do yet. But I think most of people who aren't currently trying to sell a piece of software would expect AI to include some things that you don't need to do to play Jeopardy. I'd want to see general-purpose pattern recognition, for example.