What do you think the Others plan to do to the Wights after they destroy everything? Do they plan to keep the Wights around as slave labour, or just throw them away and leave the corpses to rot after they win?

The same thing that Nagash or the Vampire Counts plan to do once they win, or the same thing that the Tyranids and the Necrons plan to do when they win – it doesn’t really matter, because all life is dead. 

But I’d like to think it looks something like this: