I'm not so sure about it anymore. I think videos and images designs being developed by AIs are much more fascinating and interesting than the ones resulting from there millionaire budgets from Hollywood these days.

After all, creativity is based on someone's repertoire of previous experiences. And the repertoire of AIs is huge, besides being possible to drive them to the kind of art design you are looking for. What AIs lack is intuition and sensitivity, what is inherent (or used to be) to human beings. That could be a decisive factor when determining if AIs are going to replace human artists.
 
However, considering the low level art in general reached nowadays, humans don't have an advantage at all on this comparison...