It is understood that the new expansion will have uprated graphics introduced and to gain the benifit from these graphics will require a little more in the way of system requirements compared to the original WoW game. Here is an extract and we will bring you more information as it becomes available.
Will there be any updates to the graphics and changes to the minimum system requirements?
Yes, there will be incremental tweaks and updates to the graphics engine in this expansion. For example, we've made improvements to the way that water is rendered.
Thats it I am afraid. We have seen that it is easy enough to roll back to previous settings quite easily if you do not meet the increased requirements.