Sock Puppet Superstar features hand-tracking and a custom voice synthesizer built in FMOD to transform players into sock puppet performers. Using hand tracking or traditional controllers, players control one or two sock puppet singers, raising and lowering them to control vocal pitch in an attempt to sing as accurately as possible. The result is a mix of rhythm gameplay and utter silliness that looks and sounds refreshingly hilarious.
This looks very much like Trombone Champ with a different control scheme, and that could be very fun indeed.
I wonder if the hand tracking is reactive enough for a rhythm game though. Trombone Champ Unflattened is fine with VR controllers, but for the full sock puppet experience it seems less fun.