Back in April, HTC launched the Vive Pro, a higher-end HTC Vive PC VR headset which added a 2nd outward-facing camera alongside a boost in display resolution. This camera setup has, until now, not seen any widespread use beyond AR experiments and niche enterprise applications, but now HTC have announced that they will be leveraging it to add native finger tracking to the Vive Pro.
Finger tracking for Vive Pro will be available to all registered VivePort developers via the Viveport SDK. This will not be a part of SteamVR and Valve seems to not be involved at all. We’ve reached out to HTC to clarify whether only Viveport apps will benefit from the input method.