Matthew Lynn in BusinessWeek on How Nokia Fell from Grace:
Nokia got to the top of its industry quickly. Once there, it became complacent. Under CEO Olli-Pekka Kallasvuo, Nokia worried about hanging onto market share rather than creating innovative products that excite customers. Second, Nokia was unwilling to challenge itself. The company clung to the idea that handsets were mainly about calling people. It failed to notice that they were just as much about checking your e-mail, finding a good restaurant, and updating your Twitter page.