Not gonna lie, I'm actually interested in seeing how this works out. Sure it has a slew of obvious problems (staying on, keeping it calibrated, theft, inability to see the ride, motion sickness, ect.), but it also seems to have a lot of advantages. Literally limitless theming possibilities, it can be removed (it wouldn't surprise me to see these with both headset and non-headset rows), and it'll be able to do things no coaster could have ever hoped to without it. Those "fantasy" coasters you see popping up in NoLimits and RCT3 where you're on a distant planet, underwater, over some massive sci-fi building, or diving through an ancient tomb? It's reality now!
I don't, however, foresee a headline in the paper reading, "Hershey, PA Man Struck in Head by Low-Flying Oculus Rift at Skyrush Roller Coaster." I bet these stick to family coasters. Thrill coasters often have the added sensation of height that this would ruin, not to mention the securing issue. But if you can wear strapless 3D glasses on Wonder Mountain, I think these with straps and teathers to the train would be fine. Plus the kids would probably find it way cooler than the adults. They could also have options like H:RRR where you can pick your ride environment. This would, in my opinion, add a lot to family coasters that don't do anything, really. Poorly-themed Arrow mine trains, Mack powered coasters, Zierer ESCs not called Verbolten, maybe smaller woodies with the proper environment. So much potential here!
So I'm treating this like I treated T3. Excited in an engineer kind of way. Not pumped to ride it, not dreading it, but curious to see if it can be pulled off.
Cedar Fair is also supposed to do this this fall. My money here is on Thunder Run, Carolina Goldrusher, or Cedar Creek.