I agree that a majority of buyers of ODST already have a 360.
Just like the majority of people who will buy Uncharted 2 already have a PS3.
It's already difficult to get into a series without playing the first, and even more difficult to warrant buying a console for one game that you have never participated in.
Now if ODST was the first Halo on 360, then I could see it selling hardware, but as it is the second (though not the same genre) I don't see it having a big impact on hardware sales.








