This is kinda an old pic, I've seen lots of analysis of it.
On the horizon to the right you can see the auto turrets. Snowbound has no physical boundaries along that side. Basically when you step out of bounds, those turrets start firing on you as a kind reminder to get in-bounds.
You can also see the new effects of two grenades here. The blue explosion on the left is the new looking blast of the Plasma grenade, while the one on the right is the spike grenade. You can tell by the focused shrapnel radiating from the smaller blast.
Early released versions of this pic showed a faintly visible HUD message that some sloppy photoshopper at Bungie had left incomplete. You can't really see it on this image but on higher resolution versions of it you could clearly see "press X to ____" or something like that. I think Bungie intentionally left it there to antagonize people.
Snow enviromentals are nice, but here you can see that these images were taken before the footprints were implemented.
The thigh holster is clearly seen on the blue spartan in the foreground. In higher res versions you can see some new, slightly dimmer lights in the armor as well.
Theres lots of fire, but not much blood. In the Multiplayer Vidoc, there was a large increase in the amount of blood that sprays and splatters about when a players is shot or killed. Maybe Bungie was concealing that from us at the time this image was released.
Let me know if I missed anything...
Heres a new image I'd like to know more about.... I guess I will on Tuesday. :mrgreen: