Google just released Android 7.0 Nougat, and as usual, they're doing a staged rollout. This means that most users won't actually get the update on their Nexus devices for a few weeks—that is, unless they take matters into their own hands.
The original implementation of Android's face unlock feature was a mess. It took too long to unlock (when it worked), brought up a huge interface that overpowered the lock screen, and maybe most egregiously, was able to be "hacked" by someone holding up a picture of your mug.
When Android 5.0 rolls out to the Nexus 5, several changes and new features will come along with it. The over-the-air update is already rolling out, and if you don't want to wait, you can get it right now.
According to T-Mobile's website, an Android version bump is due out today. While details of specific changes are sparse, the support documentation for Nexus devices very clearly notes a release date of June 2nd for the software. Sprint may have jumped the gun with its own outing of a 4.4.3 update about a month ago, but all indications point towards today's date marking the beginning of a staged-rollout from Google.
It appears that the next iteration of KitKat, Android 4.4.3, is fast approaching. If the past is any indication, today's update to the Nexus 5 software changelog on Sprint's website tells us a new version of Android will begin rolling out within 24 hours. Sprint has broken the news of a forthcoming Android release twice in the past. With 4.4.1 and 4.4.2, a mini-changelog was posted on the Sprint website about a day before Google began pushing updates to its Nexus devices.
Today, a server-side update to Google Search added the ability to take pictures and videos directly from voice commands in Google Search. Simply say "take a photo/picture" or "record/take a video" from Google Search, and your camera app will automatically open up, either in camera or camcorder mode, depending on the command it received.