The iPod is a proprietary integrated product, although that is becoming quite modular. You can download your music from Amazon as easily as you can from iTunes. You also see modularity organized around the Android operating system that is growing much faster than the iPhone. So I worry that modularity will do its work on Apple.

We all have jobs in our lives that we must get done. We reach out and bring products into our lives to get these jobs done. Marketing is all about asking, 'What job is the customer trying to accomplish?'

The basic idea that marketing is wrong at its core is one of the main reasons why innovation seems blocked and unpredictable.

Clayton M. Christensen Quotes