Here's the thing, from what most people can see right now without getting our hands on the actual game engine itself, it seems the major issues right now are once again bungie's physics engine not being optimized and streamlined to properly utilize the systems it's built for. Once we see the PC specs for what is needed to run a stable 60fps we can start really judging what's possible and where the problems lie. My guess is the PC specs are going to be well, well above what the one X can deliver, as that is still using an apu, or a CPU with an onboard integrated gpu. As is, Microsoft has had issues with honesty in the past regarding their specs, often touting the correct number of total computing units on their version of the chipset, but not actually listing how many of those are actually active/enabled, which when people do teardowns ends up being noticeably fewer than are onboard.