VR SLI gets me wet. I was worried I'd be stuck at single card performance with the 980 (and it's successors). Now I feel a lot better about SLIing this card.
It's especially great because it means someone like me can get one card now, and another when the prices are a bit lower around the time Rift CV1 finally releases. I don't really need more than a GTX970 for my current 1080p setup, but they might get me to buy another just to get the best VR experience.
I think we'll see the GPU market become very interesting once VR really takes off; PC's finally need to greatly outperform current gen consoles again.