How about collaborative work? 
If more people are interested in this, it should be possible to figure out a decent setup until we see native support for google’s cardbaord. I played around with it a little and at least managed to project my views on two planes. Now I’m struggling with the gyro sensor and lens correction or distortion or whatever it is called correctly. My sources so far are these:
I didn’t spent much time on this but it should be possible. But there are lots of unanswered questions like:
- how to get motion data from the device
- how to apply the distortion on the projection matrix
- how to handle different device resolutions (since the render targets use fixed dimensions, which are device dependent)
- and possibly more things…
So if you guys are interested, let’s try to fix it out together!