On his own blog, Fr. Z. comments that Cardinal Burke here touches on something that he (Fr. Z.) has been "harping on incessantly" for years:
I have been saying that we must revitalize our Catholic identity. We cannot do that if we don’t know who we are. We cannot know who we are or be who we are called to be without a proper liturgical worship of God. For there to be any renewal of the Church, a new evangelization – call it what you will – we must first of all revitalize our worship of God. This is why Summorum Pontificum was such a great gift. We cannot revitalize our worship without striving to reestablish continuity with how Catholic have always worshiped and brought petitions to God.