I could be totally wrong, but if I had to guess, they are using it to show off / validate their work on Microsoft Cognitive Services (Project Oxford). It has facial recognition, along with a number of other things, and so this would be an easy way of getting data on possible problems they have and how well their algorithms work. Just a guess though.
Facial recognition is pretty much solid for most cameras now, though. Face registration, which Sony have been rolling into some E-mount cameras, would be more impressive.
It's a bit different if you're prioritizing exposure of different faces based on their attributes though right? If you're taking a photo of a black person and a white person together you're often underexposing someone or overexposing someone.
