All current AAA games use more than 4 threads end of story. Games like Crysis 3 prefer real physical cores instead of HT threads. So that's an added advantage in core i7 CPU.
crisis 3 is a very graphic intensive game!! there arent many games like that yet which are that power hungry , thats my point
ofcourse some video editing programs will use it and since op mentioned that he needs that kind of power , the best gpu and cpu available makes sense