I hope it gets fleshed out later but Jesus taking the throne over this earthly kingdom seem premature at this point. I say that with respect, I don’t doubt the ultimate outcome.
However, in the last chapter there’s still a monster from the abyss that has to be dealt with and, at some point, doesn’t Jesus need to bind up a dragon or a strong man and throw him into a pit?
What about the loud voices or the trumpet caused this kingdom passing? I think most of us would agree theologically that this physical realm is under Satan’s authority. Satan told Jesus he had authority and Jesus didn’t dispute that point. It seems odd that, without more, it all changes hands with trumpets and voices here.