After all the events of Revelation, the first resurrection- of those who were beheaded for their testimony of Jesus Christ- happens, and they and everyone who survived "until the end", will live and reign with Christ for 1,000 years on earth.
Since Revelation has not ended (there have been no one-third of all the waters turning red, for example), then there are at least a thousand years more of earth.
After that, New Jerusalem descends. The world will be around for longer.
As for changes, with the U.S. decimated by the plan of the NWO to bankrupt her "as wastefully as possible", the world stage, and the forces of the world, and quality of life for the entire planet are all going into a time of reorganizing.
So, the world will be here. But, "as we know it"? I don't think so!