Would be interesting to enable voice authentication contemporaneous with face scanning to make sure the lipreading matched the utterance matches the voiceprint

Would be interesting to enable voice authentication contemporaneous with face scanning to make sure the lipreading matched the utterance matches the voiceprint matches the expected face. Bonus points that a vocal channel could be used to detect duress (especially if accompanied by, say, raised eyebrows) and either require further authentication (passphrase entry) or a "false unlock" to reveal only a nearly factory fresh app and data underlying. Could also potentially send a notification to friends that your phone had just been unlocked under duress. Bonus points for in parallel hard-scrubbing the underlying true data while displaying the false boring phone interface.