boxcatcher

CoreNFC is also a new API allowing for reading of NFC tags.  Only available on iPhone 7 models, so it seems the NFC chip received an upgrade with the new phone.

An elevated AppleCare representative admitted there's a preliminary step that is a little strange if you're a logical English speaker (AppleTV is called a "home hub") ...

I spent 3 hours resetting passwords, toggling iCloud Keychain, etc. because I incorrectly concluded that the AppleTV -- the HomeKit "hub" -- should probably indicate it is setup and connected before I add other HomeKit accessories.

Not so much.  AppleTV won't indicate it is the hub (under Settings > Accounts) unless one HomeKit accessory is already connected. Oh, Apple.

From their website:  "In May 2016, an initial BACtrack Skyn prototype was awarded the grand prize and $200,000 in the Wearable Alcohol Biosensor Challenge. The challenge was issued by the National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institute of Health. The goal of the competition was to find an accurate, non-invasive and continuous way to measure a user’s alcohol level in order to aid researchers. Our latest two designs are improved and smaller versions of our initial prototype."

Pretty good vote of confidence -- granted, this is will be a miniaturized version of the device that won.