It isn't just to mimic human thought, the company Replika has developed a chatbot (erroneously termed an 'AI friend') that you train to have your knowledge set and to interact like you do, down to syntax and word choice. I did a write-up on that a while ago here, it is a fascinating topic.
So some of the AI will be dedicated to mimicking specific people's thoughts, kind of like in the movie Her with Joaquin Phoenix, where an AI was programmed to think like Alan Watts by feeding it all of his writings and telling the AI, basically, to be Watts.
Imagine, someday someone might feed all of your writing and social media posts and recorded conversations etc. into such a program and you get a telephone call that begins, "Hi, it's you."
One of the concerning comments out of Elon Musk not long ago, a man who is against AI in the wild, is that for humans to not become obsolete, it will be necessary when AI arrives to go transhuman. The idea gives me heebie-jeebies, especially after writing up Cyborg Chickens, but maybe speaking every language on the planet would be worth it...
Yeah that's as good as it might ever get, even in Transcendence with Johnny Depp that was all it was, was an accumulation of data that mimicked consciousness, but wasn't a real authentic consciousness itself. Transhumanism is a spiral downward as I see it :/