I guess the server switchover last night ate my comments.
Sony's announced price at $399 means they're eating manufacturing costs with both fists as a loss leader then asking for seconds, but its a significant issue for Microsoft. Sony's come out and clearly laid out their plans, and they're offering more silicon for $100 less. Frankly, I think Sony was as surprised as anyone when Microsoft set their price at $499. Granted, Sony's SKU doesn't include their camera system (that's $59 extra), but many gamers don't care for that anyhow. Sony also revealed their hard disk size to match Microsoft's 500GB, and that its user-upgradable.
My take is that Microsoft's BOM forced Sony's hand at pricing, but when it turned out that Microsoft wasn't pricing aggressively, they found themselves with an unexpected win. Now, MS faces the hard choice of staying the course on the murky licensing situation and price (they may sell out initially regardless) at the cost of good-will, or backpedal on DRM and drop the price pre-launch, admitting that Sony clowned them for 90 straight minutes last night.
But the real problem, I think, is that Sony can add cloud resources to their platform, or developers can run them in the mean time -- they've traditionally been more open to third-party network services anyhow -- but Microsoft can't add more silicon to their box now. If they've got the thermal headroom, they might reach for a clock advantage of 16.5% over Sony (so, 932hz, vs 800Mhz if rumors are to be believed), which would completely close the rendering gap, but that's easier said than done, and still leaves the 4 compute-only GPU-units in Sony's box completely unaccounted for. I think the cloud actually is pretty compelling, and something Microsoft is in a unique position to leverage, but they haven't done a good job selling it to consumers -- what they really need is to demo compelling, preferably unexpected, real-world uses of the cloud infrastructure. I also think they need to eat some crow by throwing in the towel on DRM and either dropping the price to match sony, or bundle an extra controller or game in.
@Skytiger -- XBox Live isn't including 2 free games per month going forward, they're doing it starting in July and ending in November when One launches, so you'll get to download 8-10 xbox 360 games if you take advantage of it. Its to get more people used to the idea of downloading full-size console games than it is anything else.