Naturally sales have increased with the release of the gigaton that is Animal Crossing, but they've yet to prove they'll have more big system selling games in the latter half of the year.
"Increase in overall video game sales" means all consoles as well as all their popular games, so those titles that have been showing good legs are selling even better lately.
In another thread I had asked you why you are so optimistic about PS4 sales and your answer was historical precedent. How come that you don't apply the same standard to Nintendo? Meaning that you should expect Nintendo to have a better lineup in the second half of the year than the first half, because that's how it has pretty much always been. But instead you insist that Nintendo has yet to prove something, despite them proving it year after year after year.