I noticed today that my +Google Glass sunglass lenses have the exact polarity needed to block the entire screen on my iMac, but show the entire displays of my Nexus devices. Please tell me that was intentional.
Just did a little test, I just took a picture, shared/captioned with no problems. Made sure it Auto Backed up and it's still captionable. I think it's items that were on the timeline before the update.