Good news of course, but I can't see them releasing it any time soon. Whether they do or not will depend on whether it becomes commercially profitable / part of their long term strategy. The cost of producing those screens is bound to be sky high, and without any competition producing the same (no production chains) it won't get lower.
I think the intention is probably to give VR a good kick up the arse, to encourage other developers to have a go at making high res screens etc, for the sake of long term development rather than for producing an actual usable VR headset in the next couple of years. I just don't see the point in going that high so soon, no one would be able to afford such a thing, and there is little point in doubling the capabilities of the competition, when all you have to do is go one bit better and charge a little more.
I am reminded of 8K screens. In this:
The writer says "DELL’S 8K MONITOR FROM THE FUTURE HAS CONVINCED ME THAT I NEED A 4K MONITOR IN MY PRESENT"
I think that is basically the point. Move the industry along a bit by giving everyone something to aim for. Unless you have about 4000 USD lying around, in which case, go for it.