Thats because certain people only mention games that are widely known.
There's Oblivion, Mass Effect, Forza Motorsports 2, Burnout Paradise, Virtua Fighter 5, Dead or Alive 4, Dead Rising, Devil May Cry 4, Crackdown, Assassins Creed, Lost Odyssey, Viva Pinata, etc. etc. Also there's Too Human, GTA4, Fable 2, Ninja Gaiden 2, Splinter Cell Conviction, Gears of War 2, Fallout 3, etc. that are due for this year.
You could keep going, but im just making a point.