I heard Resul Pookutty speak to an audience last week...
"Keep perfecting the same thing for ten years without shifting your mind to either sides, then neither the Academy nor the world could ignore your existance."
Now, isn't that a 'lean' idea? Absolutely no fat content! Just narrow focus.
The same thing Al Ries and Jack Trout keep talking about in all their books - 'to score big, you have to narrow your focus'!