Facebook has started showing advertisers how Oculus Rift virtual reality, 360-degree goggles will fit into their marketing. They are touting it as a way to experiment with immersive experiences, per sources. Oculus, which Facebook acquired last year for $2 billion, is expected to start hitting shelves early next year, and Facebook admits it will take time to become a hit. The play for Brands is around content and virtual reality product placement.