Apple has already described OpenCL which will allow everyday programs to be able to access the power of the GPU without having to write code specific to that GPU. OpenCL will be in the core of Mac OS X 10.6. Machines like the old MacBook would be left out of this revolution but not anymore. When Apple releases 10.6 they will be able to claim a performance boost on all these new machines.
Apple released some new MacBooks this week. Aside from the manufacturing technique there is a new feature of these machines that is not getting much press. For me this feature is more significant than the case. That feature is the GPU. I do not pretent to know the virtues of the particular brands. The mere existence of the GPU is what I care about.