Mobile VR like the Samsung Gear VR or Google's Daydream has two limiting factors right now that prevent it from being as immersive as the Oculus Rift or HTC Vive. The first is horsepower, but that's something the mobile market makes advances in rapidly. The second is the lack of positional tracking (being able to track a person around a room). That second obstacle has already been solved by Stereolabs, and that solution -- the ZED camera -- is already shipping to developers.
The ZED is a depth sensing camera that currently attaches to any mobile VR headset. A pair of RGB cameras talk to an external GPU, and Stereolabs' custom software calculates a real-time depth map based on the disparity between the images. It's a technique called stereovision, and it actually trumps IR-based technologies like Microsoft's Kinect or Intel's RealSense because it can work outdoors, and over long distances.