But who will continue it? He doesn't have any children to abuse the tales of Westeros long after his death.
The Tolkien spawn and Frank Herbert's idiot son can swoop and polish up his notes.
Then the show will show us the ending. He won't let someone else write his novels, but Dan & David know the ending and what happens to the main characters in the next two books.
Don't forget Kevin J. Anderson. A Song of Ice and Fire is basically Lensman with swords, right?
Spoiler: They die. All of them. Horrifically.
I've never seen more than short clips or read a few reviews, and even I know that.