From AppleInsider: Shares of Nokia tumbled this week, as the world's largest handset maker believes its market share will recede over the next year, while competitor Apple sees continued growth with the iPhone platform. Analysts said that Nokia Oyj would not be able to keep up with Apple without an App Store-like alternative. As a result, Bloomberg said, Nokia's stock took its biggest hit in five years, dropping 15 percent, or $8.6 billion in value.

Though Nokia isn't as big a player in the U.S. as Apple, Research in Motion, or even Motorola, the global company commands a majority of the smartphone and cellphone market worldwide. Nokia estimated its smartphone market share was 41 percent for the second quarter of 2009, while the overall market share was 38 percent. In 2005, Nokia held 62 percent of the smartphone market.

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