Bonelab plans to implement the inside-out upper body tracking of Quest 3 & 3S, describing it as "the most game changing feature of VR hardware since tracked controllers in 2016".

Stress Level Zero’s Brandon J Laatsch described inside-out body tracking as “the most game changing feature of VR hardware since tracked controllers in 2016”, and said “Other hardware players either need to step up and develop it or concede the space to those who do because it will create an insurmountable divide.” […]

IOBT shipped in December. However, almost a year later it’s still only used by a tiny handful of standalone apps, including Swordsman VR, Drunkn Bar Fight, XRWorkout, and FastHands. In fact Meta’s own new avatar system doesn’t even use IOBT.