"All the lands are at rest and at peace; they break into singing." NIV translation
This is truly a time of peace like the world has never seen. This is another reason that we can say that this prophecy has yet to be fulfilled. We also notice that the land is at rest meaning it does not have to be tilled to produce crops to feed God's people.
"Even the pine trees and the cedars of Lebanon exult over you and say, 'Now that you have been laid low, no woodsman comes to cut us down.'" NIV translation
This time will be a time of complete peace as even the trees of the earth will see peace. All of the earth will rejoice in the Lord.
"The grave below is all astir to meet you at your coming; it rouses the spirits of the departed to greet you - all those who were leaders in the world; it makes them rise from their thrones - all those who were kings over the nations." NIV translation
All of those who are a part of this new Babylonian system will be put in the holding place until the time of final judgment.
"They will all respond, they will say to you, 'You also have become weak, as we are; you have become like us.' All your pomp has been brought down to the grave, along with the noise of your harps; maggots are spread out beneath you and worms cover you." NIV translation
This passage speaks to the fact that Satan will also be cast down with those that took a part in his system. The reference to "harps" speaks to the fact that, before his fall, he was the worship leader in heaven.