Apple showed off a new mixed-reality headset called Apple Vision Pro at a conference. The device blends virtual reality and augmented reality. Augmented reality is a technology that allows users to overlay virtual images on live video of the real world. Apple says the device will cost $3,499 and go on sale early next year. #cnn #news #apple #visionpro #ar #vr #headset #augmentedreality #virtualreality | Apple unveils new mixed reality headset