I asked not because I expected an answer, but because I figured you'd have an insightful opinion.

It's essentially the performance of a composition vs the composition question again: at what point am I mimicking someone to the extent they have a valid claim on a portion of my work?

I expect it'll enter the courts a few milliseconds after someone clones a dead actor (without their estate's permission) for a new performance.

There's always been an inherent tension in the US distinction between a law of nature and a creative work though. It seems a bit silly for me to claim patent / trademark on a vector that encodes my likeness.