Good: The End of Depression and Suicide
This one seems to be the most obvious and closest to reality today. A machine that can detect your true inner feelings and emotions would be super adept at identifying depression and suicidal thoughts.
Scholarly work has already determined social media postings can provide better data than self-reported information patients give their doctors. And Facebook has started rolling out AI to determine if specific posts are communicating a suicidal intent and flagging them for human moderators, or notifying local authorities. But both of those examples just flag data for humans to examine.
If the technology gets to the point where the machine will know your feelings based on your microexpressions and visual cues, then you won’t even have to paste your thoughts to tip off the machines.