Sony's recently released "Move" accessory sold more than one million motion-based controllers in the first 30 days of sale. The release of this add-on brought Sony into competition with NINTENT, which had previously been the only other video game company to offer motion-based video games. This rather unexpected and relatively high demand for this product would appear to boost and revitalize 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 launch of Sony Move, Nintendo held a 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 declined. However, the release of this add-on refueled previously flagging video game sales. A couple of dozen titles have already been made compatible with Move and the high jump...