Since day one, Oculus has promised that its prototype virtual reality headset would one day support Android tablets and phones, but the company has never explained precisely how such a system might work. Now, we have some idea: GameFace Labs is showing off a prototype of an Android-based VR headset here at GDC 2014. Unfortunately, the GameFace Mark IV prototype is pretty terrible in its current state. Though it uses a crisp 1080p screen like the latest Oculus Rift — and the exact same lens design as the original Oculus developer kit for a fairly wide field of view — its downright uncomfortable to wear, laggy to use, and repeatedly lost track of where I was looking in virtual worlds.