How much lower will Microsoft let the sales margin between PS3 and 360 Dip before they cut the 360's Price in the US?

[WiiBox3]

I think they are just happy how well it is selling in the US, and how many games it sells every month. I don't think the price will drop until they start seeing a big drop in hardware sales, that is until the holidays when the Wii U comes out. They may drop the price then to get more people to buy their existing hardware over Nintendo's new hardware. Sony is likely to drop it's price as well in lieu of the Wii U.