Versificators already existed in the 1984 story. This is some kind of brave new world-ish version of them, giving individuals control but still staying distopic

Versificators already existed in the 1984 story. This is some kind of brave new world-ish version of them, giving individuals control but still staying distopic. A device that can precisely read your brain's moods would probably be really helpful for advertisers who want to find out how you react to certain stimuli.