That's the amillennialism heresy that Christ is already reigning in heaven, we're already living in the kingdom, which is the official stance upheld by major protestant denominations, and also the reason they don't teach prophecy since they think it's all ancient history already fulfilled. It is your prerogative to believe that, but it's just an illusion. If the kingdom is already here and we're already reigning with Christ, then I dare you, change the Lord's prayer into this - "thy kingdom HAS come, thy will IS done."