Considering the movie's 11 years old, it's surprisingly on-point with depictions of AI/human interactions, relations, and societal acceptance. It does get a bit speculative and imaginative at the end though...
But I imagine that movie did/does spark the imagination of many people, and I guess Sam just couldn't let it go.
It's funny that just seven days ago I was speculating that they deliberately picked someone whose voice is very close to Scarlett's and was told right here on HN, by someone who works in AI, that the Sky voice doesn't sound anything like Scarlett and it is just a generic female voice:
https://news.ycombinator.com/item?id=40343950#40345807
Apparently .... not.