Above is the Oculus Touch being used in conjunction with the Oculus Rift.
The primary function of the Touch is to provide a more natural input for playing VR games with the just-finalized VR headset. While it won’t debut in Q1 2016 alongside the Oculus Rift’s consumer launch, the Touch will accompany the company’s catalog later on in 2016.
Some notes on what the two controllers actually are: they have capacitive touch input, gesture recognition, haptic feedback and a set of traditional buttons as well.
In short, you’ll be able to “feel” certain things in the VR space thanks to the Oculus Touch — which will complete the experience. Why can’t this come any sooner?