[Keyframe]

With an expensive Quest Pro you could capture your facial expressions using the headset's eye and face-tracking features.

Any more on this?

As for hands - is it able to track hands and fingers only or also an object within a hand? I can see this being useful to 'puppeteer' a 3D object by hand used as a proxy of it... Or a simple object within a hand.

Outside of maybe a cliff-climbing game I struggled with finding a reason for buying a headset at all. This seems like a plausible use for animation.

[diegomacario]

Well consider this sample from the Meta Movement SDK that allows you to control the facial expressions of a character with the face tracking of the Quest Pro: https://youtu.be/IQt4wTdGK64?t=315

Our tool could record those facial expressions into an Alembic file.

And as for holding objects, our tool could capture those too. Meta's Interaction SDK is excellent. Here's another sample they provide: https://youtu.be/WS4vtcwm8Zw?t=1

And I have to say that the cliff-climbing game is really fun.