It's no longer just always-listening microphones -- Google's new Nest Hub Max smart display adds a camera that's always scanning for faces.Google Home and Nest Hub gadgets already feature microphones that are always listening for the words that wake up the Assistant ("OK, Google" or "Hey, Google"). Now, the search giant's newest gadget for your home, the Nest Hub Max smart display, adds in a camera that's always watching for a familiar face.Google calls the feature Face Match, and it uses facial recognition technology to remember what you look like. After that, you can tap on the screen to see...