Via fastcodesign, the folks at MIT have tried to create a book with a crude virtual reality component: a programmable book and vest that supposedly makes the reader feel what the protagonist feels.
Follow the link if you’re curious how it’s supposed to work. There’s an embedded video, too, which I didn’t watch.
Personally, I would be embarrassed for any writer that used this technology. Text will already made the reader feel what the protagonist feels, if you do it right. That’s the point of books (well, one of the points) and having a vest that constricts, warms or cools to simulate emotions is just a distraction from the work a writer’s words are meant to do.