Of course Halo: Reach will sell systems! No game of that size has really ever failed to sell systems its just far too popular to say otherwise.
Halo: Reach will sell to:
- People who have Xbox 360s and like Halo.
- People who have Xbox 360s but haven't liked Halo enough to buy it.
- People who had Xbox 360s but don't have one now for various reasons.
- People who like Halo but haven't got an Xbox 360 but have been exposed to it.
- Etc
Some things are popular and sell well just because they are popular. If Halo is THE FPS for the year in terms of multiplayer then it'll sell a bunch of extra copies and consoles simply because its popular. Sometimes the best multiplayer game is the one which all your friends are playing, not the most fun/innovative or whatever. The fact that the Xbox 360 could be another $100 cheaper since Halo 3 was released doesn't hurt either.
Isn't Kinect coming in November? The only thing which will really push sales is its anticipation (if applicable) and any price cuts/SKU reshuffles before its released.
Edit: I should add this important point is it depends on how much more popular Halo: Reach is compared to other shooters/games this year. If it totally smites every other FPS game released in Q4 in terms of popularity then the number of systems it could potentially sell are significantly greater than if its merely as popular or less popular than Halo 3 was relative to the competition at the time in 2007.
