Don't know if this has been posted or not, but Six Flags has introduced VR on it's Superman Roller Coaster.
It's a pretty novel use of the technology, but if they don't get the timing right there is going to be a lot of puke to clean up...
Why on earth would you wear a VR headset in a real roller coaster? A roller coaster isn't meant to be used with a VR headset. If you are going to do a VR coaster, why not go the full simulation route?