This is likely to be the most true. Human value will likely mostly come from our ability to act as an adversary "AI." Like you said AI is already making great strides in the creative fields. I can see peoples 'jobs' being to tell their personalized AI that they liked a song, story or art created by it. Thust getting better at producing the personalized works in particular and creatives works in general.

The last true jobs will likely be in the fields that have the least data to build an AI on which is going to be hard to predict as everything becomes more data driven.

It's already funny to think that the creative fields were thought to be humanities last true bastion of excellency when its a data rich area perfect for AI.