I do feel like they've set up a potential swift end to the Walkers now, with the realisation that killing a walker kills all of those "under" that walker... And so if someone can kill the Night King, the rest will be dust. Most likely scenario would be Dany et al leading a huge battle as a distraction while Jon gets in close for the kill.
I just sort of wonder where they go after that though? Switch back to the war for the throne? There's not that much of Westeros left to rule at this point... Half the ancient noble houses are extinct and no one really cares anymore
