I know it's irrelevant at the moment, but basically after this war, it will be "Listen to OP Naruto" or "Listen to OP Sasuke" the Kage are pretty irrelevant now.
it still does. being hokage means leading and protecting the village; the villagers, the buildings, the shinobis, the children especially. being listened by the 5 kages and SA wont guarantee them to be able to protect the village (konoha)
It really doesn't. However, I see Sasuke reviving the Uchihi clan in the future. Naruto will follow suit. This is if Kishi plays it smart and does a time skip.
I think the title will be more of an honerary position, as Naruto & Co. will lead the village together. The shinobi world might also change where there isn't even a kage.