It keeps of growing, slowly but surly. With the games announced at SoP, it shouldn't be slowing down any time soon. Sony is build up a great user base right now, and that will pay dividends when PS5 and PSVR2 launch. I don't think they will have any trouble getting these 4.2 million people to grab PSVR2 much quick than they have grabbed PSVR1.
We are already seeing things that go far beyond what can be done with a Flat Screen and Game Pad, with just what PS4 has to offer. The number of immensely enjoyable experience I have had on PSVR are already too numerous to list. After SoP, I see even more of these experiences incoming.
As I am always looking to the future, I can not wait to see what will be possible with PS5 and PSVR2. I believe that just like PSVR is similar to PS1, PSVR2 will be just like PS2, in that it will see VR explode into the mainstream. So much goodness ahead.
If no man's sky is possible on psvr then I've no doubt the ps5 could run GTA V in psvr. That would be a killer app.