A few things:
First off, jefforange hit the nail on the head when he said that it just doesnt make financial sense to just release on one platform. The bigger the company, and the larger your economy of scale the more this applies. A platform port is a fraction of the cost of a totally new AAA class game, of course you go multi.
This applies even more between Xbox and PC , if you have a decent product not releasing on both is just silly.
Secondly, I know there are some that refuse to believe (or stop saying they believe on inet forums every chance they get) that piracy is killing PC yadda yadda yadda... but just remember, consoles deal with used game market.
Oh, and Steam has been growing in leaps and bounds by revenue, and their sales charts also go by revenue, not by units. B&M PC is dying to be sure, DD PC has been exploding. Anyone who calls out Shio while ignoring that fact, is just acting silly. The evidence is pasted all over the net, it should be pretty hard not to get the memo by now.
And about the Impulse figures, Impulse "anchor" series are SoaSE and GalCiv. Just like Steams "anchor" franchise are HL, L4D etc. Impulse therefore attracts a different crowd, one that is certainly not as mainstream but still a very large audience that supports whole sub genres of strategy games that many people, especially console folks will not have heard of. Those games still sell tens or even hundreds of thousands of copies internationally.
Also :. For those who commented in an amusing, yes uninformed fashion about how "ME2 couldn't even outsell BC2 preorder" I will kindly remind you that BC2 has been having a large and enormously popular Beta on Steam recently. If you do not see how a super popular PC franchise (Battlefield) and great game like BC2 cannot put up huge Steam preorder numbers during, and immediately after a huge and enormously popular Steam beta period..........







