This. For fun I threw a VR VNC app onto my phone and put it into a cardboard to try it out. Being able to head-track a cursor felt pretty clumsy at first, but after about 5 minutes was really something that I would want to get used to, and got pretty good at swiftly.
Admittedly, having the camera poorly reproduce RL in the background was a bit nauseating, but getting a huge forward facing screen that left nothing for distraction was truly revolutionary. (If only they could fix the slow side drift...) I could seriously see general purpose computing to be improved by this, which is to say nothing of the specific use applications like the Unreal4 in-VR VR building demo posted recently.
I for one am looking forward to our wild and crazy VR future.