Sorry for the late reply, could you elaborate your points a bit more? I was planning to build a Google Cardboard based VR system.
I'm no expert in VR, and what I came up with came from three separate things: Head tracking, Google Carboard (only the "skeleton": the cardboard and lenses) and a smartphone being set-up as a secondary monitor.
As you're the guy that knows what is doing, could you tell me where I'm wrong and that mistakes are present in my idea?