Well, yeah, I was assuming it wouldn't have been billions, but I really have no idea how much they would have lost under that scenario. However, it really depends upon how badly MS wants to gain market share. All I can say is this - I think they have a MUCH better chance of eating into Sony's US marketshare with a cheaper and less powerful console than with an equivalently priced but more powerful console.
In other words, normal, non-era console players probably care a lot more about having a cheaper console than a more powerful console.