Sansa (possibly reluctantly) says "Winterfel is yours, your grace". Littlefinger, as good as he was at playing the game, failed to realize Sansa's progression and underestimated her, and we all know how that ended up for him.
Jon Snow, of course, pledged his allegiance and that of the North to Daenerys in season 7, after she had saved him and his raiding party from the wights north of the wall.
Emotions behind Dany becoming the new ruler of Winterfell aside, her mini-convocation with Sansa signals that the two women are forming an alliance. In decision-making and in queen-killing, two heads are better than one. Jon stands between them, a gesture that could be symbolic of Jon's conflict between family and blood.
Check out what's headed to HBO in 2019 in the video above. Fans had already speculated that she might be looking at Danerys entering her home, and many are taking the new footage as confirmation of this theory. Although we've made it this far, do we really want to see very much before embarking on this journey? We can't say a lot, but we can say Dany isn't at Dragonstone anymore.
It is interesting that Sansa should acquiesce so easily, though.
Bran Stark, a.k.a. The Three-Eyed Raven (Isaac Hempstead Wright) revealed Jon Snow's true linneage, which makes him the heir to the Iron Throne, and also the nephew of his new lover. But you can bet that when they do eventually find out, it's going to be one super awkward conversation. The previous one showed Sansa hugging Jon which is most likely to be a part of the same scene.
The final season of Game of Thrones will also be the show's shortest, spanning just six episodes.