You didn't have a camera on your face. Now you have a camera on your face. Theoretically, this is useful for people who want to take a photo/video of what they'

You didn't have a camera on your face. Now you have a camera on your face. Theoretically, this is useful for people who want to take a photo/video of what they're looking at quickly and maybe hands-free. Also seem to function as a different shape of bluetooth headset. (mic+ear-firing speakers)