It seems like scripture teaches that the kingdom is both now and future...the fulfillment, but not the completeness. So, while Jesus reigns to the point that we can walk in the Spirit and please God, we are still waiting for His return to the redemption of our bodies for which we can patiently wait having these 'firstfruits'. Is this an agreement, or is there something I am still missing?
The parable of Ten Minas in Luke 19 says, "11 As they heard these things, he proceeded to tell a parable, because he was near to Jerusalem, and because they supposed that the kingdom of God was to appear immediately. 12 He said therefore, “A nobleman went into a far country to receive for himself a kingdom and then return.13 Calling ten of his servants, he gave them ten minas, and said to them, ‘Engage in business until I come.’ 14 But his citizens hated him and sent a delegation after him, saying, ‘We do not want this man to reign over us.’ 15 When he returned, having received the kingdom, he ordered these servants to whom he had given the money to be called to him, that he might know what they had gained by doing business. "
It almost seems like this parable says that He is in the process of receiving the Kingdom (through the spreading of the Gospel?), but that His return will indicate that it is complete.
Romans 8: 19 For the earnest expectation of the creature waiteth for the manifestation of the sons of God. 20 For the creature was made subject to vanity, not willingly, but by reason of him who hath subjected the same in hope, 21 Because the creature itself also shall be delivered from the bondage of corruption into the glorious liberty of the children of God. 22 For we know that the whole creation groaneth and travaileth in pain together until now. 23 And not only they, but ourselves also, which have the firstfruits of the Spirit, even we ourselves groan within ourselves, waiting for the adoption, to wit, the redemption of our body. 24 For we are saved by hope: but hope that is seen is not hope: for what a man seeth, why doth he yet hope for? 25 But if we hope for that we see not, then do we with patience wait for it.
I see the the present reigning mainly in the spreading of the Gospel to all nations, the filling up the sufferings of Christ, and a maturing of the church corporately, and the liberation of the believer.