Well, they were always less relevant, Sony just used them in the early years because they didn't have much else and that's where their big advantage was. That's why they told everyone how an indie game is as important as an AAA game and how this is the reason why PS4 is so much better if it comes to games.
And it worked, just look back how many threads we got about indie games on PS4 and how Sony destroys MS because of that in the early years of this gen. Some Sony fans were like "Indie is like AAA", simply because Sony said it.
Now Sony has a lot of bigger games and with that Sony doesn't need these games anymore (to prove anything). Now it's all about bigger exclusives and VR. But with VR only as long as they are the only console manufacturer with that. When the competition will also use VR headsets then it will be "VR isn't that relevant"