Never one for speeches, Napoleon points out some new changes at the end of the novel in quick fashion. The first would be that the animals will no longer refer to one another as "Comrade", something that he dismissed as not needed on the farm. The flag has been changed as well as the boar's skull in the front is now gone. Finally, the farm's name will go back to "Manor Farm."
On some levels, the changes are not really "changes" as they help to bring life on the farm to the same place it was under Jones. The only difference is that the pigs assume the role of leadership and not Jones. Additionally, the idea of a "revolution" is brought to a theoretical point of reckoning: The full rotation 360 degrees. In this, Napoleon's changes have brought the story and the political narrative of the farm full circle. The more things have changed, the more they have stayed the same. In this, I think that there is some level of thematic significance in that Orwell is trying to make a point about those in the position of power and how declaring independence and maintaining it end up becoming two separate realities.