HUGE change, but it will not be instantaneous.
It will first appear in the Italian Missal — which has yet to be published.
It will then take years before it percolates into the other Missals — especially English.
What is bothering many is that the Pope’s change will ONLY apply to the Catholic version. So, we will now have two versions of the Lord’s Prayer; the Catholic version and the non-Catholic version.
However, as I said in my December 2018 post, I do AGREE with the pope (for a rare change).