3 And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him:
It's quite simple. The "throne" (power and glory) is that of Jesus Christ and God the Father.
Christ received all that the Father had, including his power and glory. And not only did Christ receive this, but the redeemed will receive this as well.
And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.
To him that overcometh will I grant to sit with me in my throne, even as I also overcame, and am set down with my Father in his throne.
If anything, this verse seems to imply that the Father and Son are separate.
If I said, "Would you like to go to the movies with my sister and Lisa?", most people would think Lisa and my sister are different people.