In Revelation 21 we see that God is coming to redeem this earth and make all things new.
When we look at how God intended things to be before the fall (in Genesis 1:27) we see that He created all people in His image.
For us today-we need to ask ourselves how we personally have contributed to the current situation and what our heart response needs to be if we are not treating all people as ones who are created in God's image.
God offers an invitation-
To the thirsty (recognize their need for Jesus)
Those who overcome (remain faithful to the end)
Everyone will live forever, the question is where.
We see three promises here-
Salvation-water of life
An Inheritance-new heaven and new earth
Adoption-we are brought into His family
Some additional reading on this topic:
Garden City by John Mark Comer
The Great Divorce by C.S Lewis