You no longer need to use your finger or voice to take a snapshot, just blink and Google Glass will do the rest.
Google said that the new “wink of the eye” feature of the Google Glass will be faster.
On their blog post:
"Glass is about helping you look up and experience the world around you without getting bogged down by technology. Based on this philosophy, we've got a new setting that lets you quickly and easily capture the moments you care about with a simple wink of the eye. Whether it's capturing an amazing sunset on an evening walk, or photographing your receipt for the lunch you'll need to expense, you can now stay in the moment and wink to take a picture instantly. If you want to turn it on, just swipe over to Settings."
They also mentioned that they are developing the wink feature for other use like paying a taxi cab or shopping.
"We’re starting with pictures, but just think about what else is possible. Imagine a day where you’re riding in the back of a cab and you just wink at the meter to pay. You wink at a pair of shoes in a shop window and your size is shipped to your door. You wink at a cookbook recipe and the instructions appear right in front of you – hands-free, no mess, no fuss. Pretty cool, right?"
But the scary thing about this technology is, the device will make it easier for creepy peeping tom and voyeurs to do their creepy stuff.