Micrsoft will be releasing a new racing bundle for Xbox 360. It would be a 250GB Xbox360 with Forza 4 and a racing wheel all in one package. And it will retain the same $300 tag as the regular one.
Forza Motorsport 4 and its wireless racing wheel would cost you about $110 on its own so being able to receive them for free with no price increase is a great. It seems Microsoft doesn't plan to do official price cut but instead just give away more free items with purchase