For example, music composition, writing fiction, and similar artistic endeavors require that the artist know what people enjoy. I think that that will be done by humans for the foreseeable future.

Regarding music composition; there are already algorithms being developed for predicting the potential of a song becoming a hit. Next step could be algorithms that creates the songs by themselves. Its all about optimization with positive feedback. Algorithm: Create a piece of art A such that A has a high probability of satisfying the ones experiencing it. Input statistics about human nature + reaction to previous generations + reactions to man made art of the same sort. Most people wouldn't care about how that piece of art was made. (But I guess this will take a while)