In the beginning, Miyamoto broke some molds in gameplay and design.
He pretty much made Nintendo what it was.
Now he's beating it into the ground. I mean, how can you let someone who openly admits he doesn't even play video games anymore to run a video game company and direct what types of consoles and games that company should make?
Sony and Microsoft let the market dictate what should be made.
Nintendo lets Miyamoto dictate what should be made.