Here John is veiwing a new heaven and earth.
Re 21:1 ¶ And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.
Regardless of your Eschatology, almost everyone will understand this to be something new and different, a prophecy that has been revealed but has not yet been fulfilled. After the final judgement in Revelation 20, "old things are passed away, and behold, all things are become new".
The People's New Testament Commentary writes,
I saw a new heaven and a new earth. The scriptures both of the Old and New Testaments point to the destruction of the old earth when the Lord comes to judgment. 2Pe 3:10 It is to undergo a purification and a renewal to fit it for the home of the saints in glory. The "old heavens and earth," which I understand to comprehend the old world and its order, so sadly out of joint, pass away at the time of the great judgment, and the old state of things shall be succeeded by a new order, both physical and moral.
This is a partial list of the many passages that contain prophecies revealed. Some will be fulfilled already, some will not, but all will show to all of us the Majesty and Glory of God Himself!
