I'm waiting on that as well. But things are so early on and some of the SDKs Unity has to integrate haven't even hit v1., so it's a bit hard to support.

Also, even if they do automate handling the rendering and input aspects of each VR SDK, you will still have to deal with the various different platform / store level aspects. Google Play versus Oculus Home versus Steam versus whatever else comes in. It's already a struggle maintaining separate Rift/GearVR builds in Unity, when I have to maintain 4 different environments and their platforms? Yeah...