Sony's recently launched “Move” accessory sold over 1 million motion-based controllers in the first 30 days they went on sale. The release of this add-on put Sony in competition with Nintento, which was previously the only other video game company to offer motion-based video games. This relatively high, rather unexpected, demand for this product would seem to boost and reinvigorate sales in the video game industry. This high demand has also caused a shortage of this product, making it difficult for Sony to keep it in stock. Before the release of the Sony Move, Nintendo was the monopoly on motion-controlled gaming systems, with its "Wii" console. With the arrival of the Move on the market, they turn this product into an oligopoly because there is now more than one supplier of this product. Since this device was priced lower than the Nintendo Wii, Nintendo's sales fell. However, the release of this add-on has revived previously declining video game sales. There have already been a few dozen titles made compatible for the Move, and with the high price...