http://news.vgchartz.com/news.php?id=1297
The American release of Metal Gear Solid 4,
combined with the $100 Playstation 3 giftcard offer at retailer Walmart
resulted in a 180% increase of Playstation 3 hardware sales. The 70,000 Metal Gear Solid 4 bundles supplied by Sony sold out immediately and with no confirmation of further shipments, it is expected that the hardware boost will be short-lived and PS3 sales will return to normal levels within the next couple of weeks. Many retailers have accused Sony of severely underestimating demand and suggest that they could have sold 2-3 times as many if the supply had been available.
Playstation 3 worldwide sales have more than doubled compared to last week.