Oculus debuted its Touch VR motion controllers when it announced the final consumer version of the rift. Earlier in the year, HTC and Valve had demonstrated with the HTC Vive’s SteamVR controllers that natural interactions in VR (that is, in contrast to abstracted interaction using a game controller) are far more compelling. It only made sense then that Oculus would follow suit.
The Touch controllers are tracked by the same camera-based Constellation system as the Rift headset, but a second camera allows for full 180-degree tracking. Like the SteamVR controllers (and Wiimote and Move controllers), the Oculus Touch controllers are handheld and use the tracking to position your hands in the VR space but still use buttons to interact with most in-VR objects.
However, their most unique feature is enabled by the ring that encircles your finger. The ring contains sensors that allow the controllers to track finger gestures, which enhances social interactions when in multi-person VR -- something Facebook is surely interested in enabling.
The Touch controllers do not come included with the Rift itself, and Oculus has not committed to a release date, saying only that they’ll be out in the second half of 2016. There is also the unanswered question of whether the Rift plus Touch will be capable of full room-scale VR, like the HTC Vive.