Firewall Zero is essentially rainbow six in VR.That sounds cool in theory, but might be annoying in a game.
What Rainbow Six Siege brought this gen was the most innovative mix of realism, fukkery and attention to detail I've seen in a shooter in a long time.
It’s still too expensive for an experimental purchase but anyone who has played the heavy hitters on VR will tell you that it’s definitely the next big leap for video games.
Everything else has peaked and as you alluded to in the OP, new hardware isn’t going to change that.