Remember Jesus said “My kingdom is not of this world. If my kingdom were of this world, then my servants would fight, that I wouldn’t be delivered to the Jews. But now my kingdom is not from here.” Jn 18:36 WEB

A new universe is coming, “a new heavens and a new earth in which dwells righteousness.” 2Pe 3:13. Peter is referring to passages like Isa 66:22 as a future thing to be fulfilled.

“For as the new heavens and the new earth, which I will make, shall remain before me, says Yahweh, …” Isa 66:22 WEB

What will it be like?

The saints will sit down with Jesus on His throne to rule this new universe, Rev 3:21 and many other passages.

What the physicists call “The Second Law of Thermodynamics,” or Entropy, or “things run down,” will not be an operating principle in this new universe.

God will severely shake this present universe one more time.

“26 whose voice shook the earth, then, but now he has promised, saying, “Yet once more I will shake not only the earth, but also the heavens.” 27 This phrase, “Yet once more,” signifies the removing of those things that are shaken, as of things that have been made, that those things which are not shaken may remain. 28 Therefore, receiving a kingdom that can’t be shaken, let us have grace, through which we serve God acceptably, with reverence and awe,”
Heb 12:26-28 WEB

“that the creation itself also will be delivered from the bondage of decay into the liberty of the glory of the children of God.” Rom 8:21 WEB

And since things won’t run down, you will never die.

The descriptions are wonderful, glorious!

“6 The wolf shall dwell with the lamb, and the leopard shall lie down with the kid; and the calf and the young lion and the fattened calf together; and a little child shall lead them. 7 The cow and the bear shall feed; their young ones shall lie down together; and the lion shall eat straw like the ox. 8 The sucking child shall play on the hole of the asp, and the weaned child shall put his hand on the adder’s den. 9 They shall not hurt nor destroy in all my holy mountain; for the earth shall be full of the knowledge of Yahweh, as the waters cover the sea.”
Isa 11:6-9 WEB

We as Christians have come to the heavenly Jerusalem according to Heb 12:22. Isaiah describes that heavenly Jerusalem.

“21 They shall build houses, and inhabit them; and they shall plant vineyards, and eat the fruit of them. 22 They shall not build, and another inhabit; they shall not plant, and another eat: for as the days of a tree shall be the days of my people, and my chosen shall long enjoy the work of their hands. … 24 It shall happen that, before they call, I will answer; and while they are yet speaking, I will hear.”
Isa 65:20-25 WEB

KJV is the King James Version, 1611

WEB is the World English Bible, a copyright free revision
of the original ASV American Standard Version 1901

nf is my own translation based on the WEB