Perhaps using the front camera to overlay real faces might permit richer conversational interaction?
yes the goal is holographic avatars. But before we can get there, we can use front camera to track user faces and animate the 3D characters. We already have mouth tracking :).
We believe this will help solve zoom fatigue as you can now read body language.
The app is fantastic! I can see this becoming something big in the next 2-3 years.