VR is unlike any peripheral that came before, so it makes more sense to support it for the long term. Sony said they are supporting VR long-term.
I agree VR is unlike any other peripheral. That being said Sony says a lot of things. It's in their best interest to say they're going to support VR long term. Doesn't mean they'll actually do it. MS said Kinect 2 would always be a part of the X1. Money is the deciding factor and if the PSVR isn't bringing in the software sales then I can definitely see Sony cutting support. Only time will tell.