Also face blindness, or people with failing memory. Imagine if this system could automatically detect friends based on their face and summon their names and relevant context (recent calendar appointments, pictures, etc.)
heck, I think that a huge portion of the population would like that. I need to meet a person twice to remember their name, Having a thing that blips up "This is Eric, You met him 3 weeks ago at a workshop" would be worth early adopting.