Actually, they have already cut their price, by adding the bundled software.
As far as I've seen in the rumor mill, and various places, my opinion is this:
Microsoft will include the bundled games until the end of Christmas, and revert to normal boxes.
When GTA IV comes out, they will drop the price another $50, if not before. As far as I've heard, MS has given, or will give, the option of detatching the bundled FM/MUA games, so they can drop the price another $50 and re-sell the games (notice no "not for resell" stickers on the X360?)