@everybody disagreeing with Shiggy...
This is what the rest of the world thinks all gamers are like:

That is not what all gamers are like. But games like Call of Duty aren't helping us fix that misconception. Games like Wii Sports and Just Dance are.
That is what Miyamoto is talking about.
Several times Miyamoto has brought up this book:

Game Over: How Nintendo Zapped an American Industry, Captured Your Dollars, and Enslaved Your Children.
It's an awesome book that I highly recommend, and covers all the crazy lawsuits over Donkey Kong, Mortal Kombat, Night Trap, Tengen, Tetris, and the history of Nintendo from the 1800s up to about the Nintendo 64 or so.
Anyway, Miyamoto always brings up the cover of that book, and how it really bothered him. That's what people think of gamers. They think they're kids glued to the TV rotting their brains and wasting their lives. That's the image Miyamoto is fighting against.