This War story arc definitely feels like the final arc. Everything's built up to this point, the characters have their final power ups, and the current fights aren't really developing the cast so much as giving closure to it. We mostly are seeing flashbacks to remind us of how far the characters have come since the start of the series, and then see them reveal their "final moves" or whatever to demonstrate their coming of age or full maturity.
The series has gone on long enough. I don't want Kishi to rush the ending; far from it. But once he does justice to this latest arc, and gives the War the ending it deserves, I want to see the series come to a close. Kabuto's defeat, Madara's defeat, Sasuke's redemption, Naruto finally choosing a girl... I can't wait. But that's the end, imo.