Isaiah saw the feast coming, and it's a feast that we see even more clearly on this side of side of the Easter Sunday. Death has been defeated, and it now serves the purposes of the church (1 Corinthians 3:22). The new creation has dawned. And through the gospel, the elect are being invited from every nation to participate in the feast (Revelation 19:9).
It does not mean all the tears have been dried, but it does mean the tears have been defeated. Sorrow will continue to be part of our daily lives in this fallen world. And weeping continues to play a valuable role in our gospel ministry to the world and to one another (Acts 20:19, 31; Romans 12:15).
But when we cry, we cry through eyes that have seen a glimpse of the age to come. Just as surely as Christ has wiped away every one of our sins, so will he one day wipe away every one of our tears (Acts 3:19, Colossians 2:14).
Death has been defeated. Death will be swallowed. The old things are passing away. Easter reminds us that Christ lives, and because Christ lives, our tears of sorrow — every one of them — are being undone.