So far from what I've seen, I haven't found a reason to want a pair. Are you feeling an overwhelming need for a pair of glasses that can tell you that a jellyfish is a jellyfish?
Do you really want to live in a world where everything is labeled?
What about the privacy issues if facial recognition is incorporated. Do you want anyone looking at you through a pair to know your name and to have access to all the information about you that's available online, whether they know you personally or not?
What issues do these glasses raise for you?