When AR takes off, I'd like to create a wearable that 'reminds/nudges' you about who people are, even people you should know no matter what, like your own son or daughter.
I'd like to see if gentle reminders, when memories are fading, or unreachable could possibly help with some coherency, of course I'd need to work with medical experts to test out, ways to make AR work to improve cognition, but I think there's a real opportunity there.