In reply to: ...and now my watch has ended. * posted by Porpoiseboy
1) That fact immediately made her claims to the Iron Throne weak
2) It created a huge tension in him, that prevented him from seeing how Daenerys really was. He was the true heir and he didn't want it
3) It allowed Sansa to blow up Daenerys' inner circle
4) It was another brick in the "A Targaryen alone in the world" wall
I think it mattered a great deal, it set everything in motion for this season