>Let’s be clear about how Windows Hello works on the Lumia 950. It doesn’t use facial recognition, but instead relies on the front camera and a nearfield IR diode so that the camera can clearly see your iris. When you enable Windows Hello for the first time, your iris is scanned and a cryptographic hash is generated and stored securely on the phone. When you attempt to unlock the device using Windows Hello, a new hash is generated and compared with the original, and if the two match, access is granted.
>Facial recognition on the other hand, as used in some new notebooks designed for Windows 10 and Intel’s RealSense F200 camera, uses three different methods to recognize your face: infrared, a standard camera, and a 3D camera. This technology requires more space inside the device and as such isn’t suitable for use in phones, but unlike iris scanning works at a distance.
You didn't get downvoted for mentioning a feature already implemented elsewhere, you were downvoted by trying to claim a device did something it clearly didn't.
That article doesn't say anything about an infrared dot map of the face - just that "the infrared camera is first used to light up your eyes".
Additionally, https://en.wikipedia.org/wiki/Iris_recognition says "Iris recognition uses video camera technology with subtle near infrared illumination to acquire images of the detail-rich, intricate structures of the iris which are visible externally" which doesn't involve any kind of infrared dot map.
