I am optimistic that the reconciliation between Rome and the SSPX will take place, especially with this latest news. I pray that it does come about. I believe that the restoration of the Church will be through Tradition, and the Tridentine Mass (known as the Extraordinary Form).
The Tridentine Mass may have never come back if it had not been for the SSPX. With the SSPX back in “full communion with the Church” (I don’t like that term, but it is the term being used) I think the Tridentine Mass will spread much more quickly.