The battle hasn't turned around because the only possible country Xbox One is going to win in is the US, and with the $100 difference and the less hardcore gamers who just want a system to play Call of Duty, the US is either going to be in Sony's favor, or if not, it'll atleast be even.
While no one ever thought Japan was going to go Xbox anyways, if Yakuza Ishin is PS4 exclusive, just chalk that up for a win in Japan. It's over after one game.