I think he obviously meant games being simple to learn, not to beat.
Smash Bros Melee would be a PERFECT example. The controls are so simple and straight-forward anyone can learn to play it in just minutes. It's one of the best "pick up and play" games ever.
Luigi's Mansion, on the other hand, goes against Nintendo's new focus.
It's over-complicated duel-analog controls are really frustrating at first and takes a while to get used to. The original Pikmin also, unfortunately, doesn't live up to the new focus either. Miyamoto himself lamented that the game ended up too complicated (not difficult, but complicated) and wasn't the "pick up and play" title he wanted it to be.