Google has just announced a massive update to Google Glass which adds a lock screen, Hangouts chat, direct YouTube uploading via a Glass app and a ‘wink to shoot a picture’ mode. The wink photo mode is obviously interesting as developers had dug up references to it in the Glass firmware a while ago and it’s just making an appearance now. You can shoot images by simply turning the mode on and winking your eye to snap photos. This eliminates the need to snap an image using the photo button or a voice command. There are some immediate privacy issues which rear their heads here of course — winking is a lot less obtrusive than a hand to the face or saying it out loud. “Glass is about helping you look up and experience the world around you without getting bogged down by technology,” reads the posting.