ATI's Radeon X1900 (R580) will feature 48 shaders and 16 pixel pipelines, and NVIDIA's upcoming G71 (maybe the GeForce 7900?) will have 32 pipelines, but just 16 ROPs.
As the G71 will be able to process 32 pixels per clock, it will physically have 32 pipelines but will have just 16 ROPs. This is no surprise to us as Nvidia's G70, Geforce 7800 GTX actually has 24 pipelines and 16 ROPs.
This means that Nvidia and ATI will take completely new approaches, where Nvidia will try to convince everyone that you need more raw pixels than pixel operations.