I expect this to be streamlined and used by law enforcement as an alternative for polygraphs.
By the time anyone questions its efficacy it will be too late.
To the thought-extractor citizen -- we'll get to the bottom of this!
"Law enforcement" in most of the world is not on the side of regular citizens.
And everyone should fear because such tech could also be abused to falsely accuse you of being in some hated group. Police lie about drugs often enough to be a threat to liberty; they need less tools they can lie about, not more.