ATI and new MacPro
I agree with the above, there is only speculation as to the case. But think how little changed on the exterior with the powerpc going to the macpro. I think apple will make some changes but not much on the outside. The inside will definetly be nehalem server parts with 2p setup. As for the memory, the specs are already out, DDR3 ECC probably at 1333, and later 1600 when intel releases those parts. Similar to what happened with the MacPro.
As for ATI and nVidia, that is a whole new area open to debate. ATI makes great quality parts, and in fact their notebook parts have been much more reliable than nVidia as of late. Look at the mess and financial writeoffs nVidia has been giving out for their failing 8600M parts. But on the Pro side, the Quadro cards pretty much rule this area for now. ATI let the FIREGL cards lag behind, but you never know. As for support of Mac core graphics, ATI drivers and architecture are way faster. Their 3870 beats the pants of the current 8800GT. Lets just see what comes out next. My only wish/request is stop giving us Mac users last generation parts, and offer the latest and greatest. In this respect, offer us the HD4870 or HD4870x2 and the GeForce 260/280/295 parts for desktop users, and the latest FIREFL or Quadro FX5800 for Pro users.
Peace,
Noushy