Preterism, partial preterism, same difference the way you talk.
Err, no - and it's not my fault you don't know the difference.
this is not the new earth
sin and death still exist
Jesus is still in Heaven, He has not come back yet.
This is Eschatological Tension - the 'now and not yet' nature of the kingdom we are in now. As the Gospel Coalition says of the Kingdom of God, it is both here now but yet to come in fulness.
The Kingdom of God, Present
In the New Testament, the promised Messiah comes as “Jesus Christ, the Son of David, the Son of Abraham” (Matt. 1:1). Through his incarnation, sinless life, crucifixion, and resurrection, Jesus fulfills the messianic promises, accomplishes the messianic mission, and brings redemption to a lost world.
Jesus is the King whose words and deeds bring the spiritual kingdom of God. He proclaims the coming of the kingdom (Matt. 4:17; Mark 1:15; Luke 4:43), preaches the parables of the kingdom (Matt. 13:1–50), and declares the ethics and nature of the kingdom (Matt. 5–7). His deeds, especially his casting out demons by the Spirit, usher in the kingdom: “If I drive out demons by the Spirit of God, then the kingdom of God has come upon you” (Matt. 12:28; cf. Luke 11:20). Christ’s mission always leads “up to Jerusalem” and his death and resurrection, where he brings salvation through his sacrifice.
In his ascension, Jesus moves from the limited earthly sphere to the transcendent heavenly one. He sits at God’s right hand “in the heavens—far above every ruler and authority, power and dominion” (Eph. 1:20–21) now and forever. When Jesus pours out the Spirit on the church at Pentecost, God’s kingdom expands mightily as thousands come to Christ (Acts 2:41, 47; 4:4). Peter explains: “God exalted this man to his right hand as ruler and Savior, to give repentance to Israel and forgiveness of sins” (Acts 5:31). God rescues sinners “from the domain of darkness” and transfers them “into the kingdom of the Son he loves” (Col. 1:13–14).
The “kingdom,” as God’s reign over his people, will finally and ultimately “come at the end of the age in a mighty irruption into history inaugurating the perfect order of the age to come.” And yet this kingdom “has already come into history in the person and mission of Jesus,” and thus the “presence of the future” is already evident (see George Eldon Ladd, The Presence of the Future, 144–49). So, God’s reign is present and future, already and not yet, his active invasion of history now and his final establishment of the age to come. It is a sovereign rule, a dynamic power, and a divine activity. As the bearer of this kingdom, Jesus requires repentance to enter his kingdom community, since the present way of the world must be rejected and the new age of God’s rule and its corresponding way of life embraced. As such, repentance is not only the way into the kingdom but also the way of the kingdom.
The New Testament also proclaims that Jesus will return to reign as king, bringing justice, peace, delight, and victory. We live, then, in the tension between the “already” and the “not yet.” The kingdom was established with Israel, inaugurated with Christ in his coming, and achieved in the events of Christ’s death and resurrection. Even though the kingdom effects have begun, their full results await Christ’s return.
The Kingdom of God, Future
Although Jesus in his earthly ministry brings the kingdom, which expands exponentially at Pentecost, the fullness of the kingdom awaits until “the Son of Man comes in his glory” and sits “on his glorious throne” (Matt. 25:31). Then the angels will proclaim, “The kingdom of the world has become the kingdom of our Lord and of his Christ, and he will reign forever and ever” (Rev. 11:15). Jesus will judge the world, inviting believers to “inherit the kingdom” while consigning the lost to eternal punishment (Matt. 25:31–46). At “the end,” Jesus will hand “over the kingdom to God the Father” (1 Cor. 15:24).
Thus the new heavens and new earth will be the final stage of the kingdom of God. The kingdom of God will be at peace only in the end. Though Jesus’s victory has been won, the battle rages until his second coming (1 Pet. 5:8). God’s people conquer through Christ, who loves them and has given himself for them (Gal. 2:20). “The Lion from the tribe of Judah” who “has conquered” is the slain Lamb (Rev. 5:5–6). When the final installment of the kingdom arrives, the struggles of the present life will be past. By God’s grace, believers will reign with Christ. Human life will flourish, and human culture will thrive in the city of God (Heb. 2:5–10; Rev. 21:24–26). Jesus will return, deliver his people, and bring the final installment of his kingdom (Rev. 11:15).
Heaven involves God’s people serving their great King as subjects of his kingdom now and forever: “They are before the throne of God, and they serve him day and night” (Rev. 7:15). The Evil One is a defeated foe who will one day be thrown into the lake of fire (Rev. 20:10). Through Christ, believers overcome death, so that at death they go to be with him (Phil. 1:23), and in the resurrection, death will be banished (1 Cor. 15:26; Rev. 21:4).
Conclusion
The kingdom of God is central to the biblical story of redemption. The story follows the narrative of the fall, the calling of the nation of Israel, and the coming of the promised Messiah, while prophesying his return one day in the culmination of all things, at which time he will set up the new Eden of God’s kingdom in the new heavens and new earth. In the meantime, we live in the already and not yet of the kingdom, serving our King and looking for his return.
The Kingdom of God - The Gospel Coalition