This is the next generation neck worn pc that capture the best moments of your life. You'll never have to say "If only I had it on camera" ever again. Momenta measures your heart rate and and starts filming when your heart rate increases.
It can also film accidents which the wearer witnessed. Momenta will run using Microsoft operating system, SLIM.
via nextgendesigncomp.com

What are this thing actually? Are this something can capture any moment when our heart rate is not normal?