Last night was the first debate for the 2016 Democratic presidential candidates, but it was also the first presidential debate in history that could be viewed in virtual reality. CNN teamed up with software company NextVR to broadcast the event live in a 360-degree virtual reality video accessible only to users of Samsung's Gear VR headset, which is available now for $99 on the Samsung Store, and requires a Samsung Galaxy Note 4 smartphone as the viewer.