It's just sound business sense. You really think S-E entered this gen with a plan to bury the PS3? No, it's simply that this generation panned out differently to how it was expected and S-E has made changes to the distribution of its key software to ensure it gives itself a better chance of making money. That's what this business is all about after all. Also you'll find that S-E said it expects the 360's presence in the Japanese market to increase into the future, it never said it wants the 360 to overtake the PS3. S-E has no obligation to anyone to keep producing games for a particular company's machines, its aim is to make as much money for itself and its shareholders as possible.
If you want to genuinely question S-E's direction, you'd be best served asking why it is offering next to no support for the Wii given it is the clear market leader with low development costs.
