It'll be interesting to see if it was a one-time bump for Xbox sales.
The success of Halo 3, which is exclusive to Microsoft’s Xbox 360, appears to have driven sales of that console. According to NPD, Microsoft sold 528,000 360s, compared to 500,001 Nintendo Wiis and 119,000 PlayStation 3s.
And the PlayStation 3, well, it has settled into a comfortable third place among the next-generation platforms. A price cut announced this week may spur sales over the holiday season, but you could imagine that the curriculum makers at Harvard Business School may eventually make a case study of Sony’s inability to maintain its leadership in the console wars.
Of course, Nintendo would probably be selling a lot more Wiis if they weren't still supply-constrained...