This seems to be Microsoft's MO, and it seems to have worked with the XBox. Push hard, buy a second place position with massive marketing, investment, and underpricing, and continue to maintain it while losing billions and billions. Then the first place company inevitably, eventually makes a series of horrible, very public missteps, and Microsoft is positioned as "The Alternative."
On one hand, I think it's a pretty sleazy tactic, but on the other hand I rarely ever see any corporation thinking in the long term, especially to this absurd degree. I'm not exactly sure what the strategy is to defend against this, either.