OP here - I suffer from migraines as well; being able to work in a black void with minimal interface has helped me be functional in situations I'd otherwise just have to stay in bed, triptans notwithstanding. I didn't want to bring it up in the article though because I didn't want to make false promises or urge migraine sufferers to adopt it - in the early days of VR, the bad software IPD management in the DK2 would actually trigger migraines for me.
As an accessibility tool I'm delighted to see it working for another migraine sufferer though.