According to FiringSquad, Dark Sector, "the first ever next-gen game," has been delayed:

Originally scheduled for release this fall, a spokesperson for the game's publisher D3Publishing has now told FiringSquad, "We've decided to pull Dark Sector out of a very crowded holiday season and it is now slated for release in Q1 2008." The questions about the release date for the game began after retail sites like Gamestop showed a new Jan. 15 2008 release date for Dark Sector.
The "Coming Early 2008" text on the official website backs this report up ;)