It isn't unusual for Samsung to summon experts and giant personalities on stage to help it market its newest smartphones. But when it comes to its VR products, it needed a stronger push. When it first unveiled the Gear VR, it had game development luminary John Carmack of DOOM fame make the tech spiel. This year, Carmack's boss is the one doing the talking. At Samsung's UNPACKED event at MWC 2016, Facebook CEO Mark Zuckerberg went on stage not only to "sell" the Gear VR, which was made together with Oculus, but to emphasize the connection between Facebook and this new VR hype.