I agree with Vin, if they are a head of there projected sales, they have no reason to lower there prices. The system is a better value for your dollar over the other consoles: Free Access to the PSN, Blu-Ray, WiFi internet, etc, etc, etc.
Also Sony is really starting to flex there first party exclusive muscle. While I do like Gears (I agree Halo was the most over rated game ever), Sony has the more robust line up this season. They also have much more in the pipe line compared to there competitors. Early 2009 will see more amazing first party releases like: White Night Chronicles and Kill Zone.