This game is far bigger then Bioshock and Gear of War, even put together. So there are plenty of people that simply waited for this one title before buyin the system, it'll definitly move the userbase. But I think an even bigger element, is how many people will be joining Live, the service has to be MS's bread and butter. and I know tons and tons of people who have 360s most of which haven't bothered with Live, because nothing on their has been too exciting for them. So Imagine, Halo 3 ins't just a multi-million seller, it's seperate SKUs and LIVE attach rate, has to add huge cash.
Plus for those who question the money brought in by Halo 3 think about all the other crap it sells, I bet when downloadable content goes on sale it will sell in the millions too. Between that and GTA having downloadable content, Microsoft will have an incredibly strong LIVE userbase, one in which is already making them advertising dollars.







