You needed PSVR to play RE7 in VR mode. RE7 wasn't a killer app for PSVR though. What makes this different? I mean, I'm open to arguments at this point.
I feel like a killer app for PSVR is a game that makes you go out and buy a headset. The VR mode for Dreams is exclusive to VR (obviously) and offers experiences that you wouldn't get without VR. I personally don't feel like a game has to be VR-exclusive for it to be a killer app. This game more than any other is making me for the first time seriously consider buying a VR headset :)
I think we have a different understanding of what a killer app is maybe?
Predicted 15+ million lifetime-sales for God of War: