https://www.gamespot.com/articles/oculus-santa-cruz-prototype-opens-up-new-possibili/1100-6454017/

We recently had the chance to try out Oculus’ latest prototype of its wireless VR headset at the Connect 4 event. Codenamed Santa Cruz 2, the head-mounted display uses four front-facing sensors that allow it to provide six-degrees of movement, which allows you to effectively lean into and away from objects. This is a crucial VR feature that other wireless HMDs like Gear VR and Google Daydream lack.