Today at a developer session in Build, we got to see a demo of Windows Hello. It’s a biometric authentication which can provide instant access to your Windows 10 devices. Windows 10 supports three types of biometric authentication: fingerprint, face, and iris. We recorded the demo of unlocking a computer and making an app purchase by placing your face in front of the camera.
More details: http://www.windowscentral.com/windows-hello-face-authentication-build-2015