Ryan Shrout of
PC Perspective has nab a copy of Shadow Ops to see if the 64 bit hype is all it is cracked up to be. Don't expect to see any benchmarks in this review as platform and drivers are still in their beta state. There are a ton of image quality shots to show the difference between 32 bit and 64 bit modes.
These additional items that were added into the 64-bit game are mostly "fluff" -- they add a bit of realism to the game -- but I see no reason why the same items could not have been added to the 32-bit version as well. There is certainly no technical reason for them to be omited. And while that "fluff" is by no means a bad thing, I would guess that it was added into the 64-bit only version either due to marketing desires from either Atari or AMD or purely for development time considerations.
Source : AnandTech