The concept could even draw on ambient and biometric data (such as your heart rate or pupil dilation) to gauge your emotional state and reflect that in your avatar.

This is just a patent, and there's no certainty that Samsung will make use of it. The company first filed the patent in March 2016, or a full two years before the Galaxy S9 arrived -- Samsung might have had a chance to implement the technology by now. Even if nothing happens, though, the patent shows that Samsung has been exploring augmented reality avatar uses for a long while.