wrong category?
But if I was concerned with performance, the iMac will support more ram and fusion drive. And has higher performance CPU and GPU available.
Of course, the iMacs arent available yet. So its hard to say with certainty what it will be configurable with until November. er, December?
The MBP will be more than enough for a lot of users, but some will hit a ceiling on a laptop due to it just not being as practical for a heavily augmented desktop usage with lots of peripherals.