So as I'm sure many of you have heard Google has released an app called "Google Cardboard" too allow users to have virtual reality with nothing but their phone, a cardboard box, and a couple lenses.
All you have to do is download the app and either build your own or purchase a pre-assembled cardboard vr set (~$25) then simply slip your phone in the box and launch the app. When you look into the box each eye will see half the screen and you will see in 3D.
But wait! There's More! An app called "Limelight Gamestream" exists for android that basically catches the signal output of the Nvidia gamestream to use any android device as a shield tablet so basically you can stream ANYTHING from your PC to your android.
Drum roll please.... Now imagine them.... combined! <Insert head explosion here>
Now I haven't found an app that will do this yet but if something exists to cardboard-ify anything on your phones screen then you would be able to stream say I don't know... Fallout New Vegas to your device and take a walk around the Mojave dessert without needing to purchase anything addition except for the cardboard itself.
https://cardboard.withgoogle.com/
http://limelight-stream.com/