Halo 3 was on it's way even before the Xbox 360 was released. It's nothing new. What you could talk about is when the game will come out. While earlier Gates had claimed that Microsoft will release the game to co-incide with the PS3 release, he recently backtracked and said they would release it when Bungie were ready to release it. I doubt if they'll release it for the PC. Halo 2 never came out for the PC so don't set your hopes too high.