Galaxy Tab S4 firmware shows us how to use Intelligent Scan

Look into the eyes of your Android tablet and what it will see is a way to check to make sure you are who really owns the Tab S4.
Samsung Galaxy S9+ review

Galaxy S9 updated right out of the box in US

The camera and face unlock features both got stability updates to make sure they really worked smoothly from day one of ownership.

Intelligent Scan on Galaxy S9 authenticates through face and iris

Samsung may be looking into combining biometric data from users’ faces and eyes for non-fingerprint authentication in less than ideal lighting conditions.