That the voice is called Sky is actually part of what's suspicious about this to me. They had all the world of female names to choose from for the voice that would recreate "Her" (and there's plenty of evidence that suggests that the movie was used as inspiration), and they chose one that started with the same rare consonant cluster as this actress. The only other names that Wikipedia lists with that consonant cluster are Skyler and Scarlett [0]. If they truly were trying to separate themselves from her rather than subtly cue the likeness, why Sky?
> She isn't that well known, I didn't even know she was in Her.
She's the second-highest-grossing actor (and the highest-grossing actress) of all time [1]. You might not know her (and neither do I), but that says more about you and me than it does about her.
[0] https://en.m.wikipedia.org/w/index.php?title=Category:Englis...
[1] https://en.m.wikipedia.org/wiki/List_of_highest-grossing_act...
Okay so we can't use voices that are similar to actress voices, and we can't use names that starts with the same "rare consonant cluster" as actress names.
This is getting ridiculous
No, we just can't advertise or get other clear benefits based on the fame of something well-known without considering these entities.
It is about the overall picture, and in this case there is very high relation to the movie and Scarlett.
Most people have never heard of Her. It wasn't a very big movie, especially outside tech circles. Most of my friends who aren't in tech would have no clue that Altman was referring to an AI in a movie.
I'm not convinced that the pieces all add up to a slam dunk, but you can't dismiss them one by one, you have to look at the whole.