Except for the speed bump to main CPU, its basically the same as the 13" MacBook. Just like its earlier relative, the same NVIDIA GeForce 9400M uses a portion of main memory for its VRAM. It is the first time in recent PowerBook or MacBook Pro that used shared memory (but I note the *new* low end 15" also uses shared memory). Except it adds FireWire 800 and an SD slot. Both welcome additions. On a side: I wait and see how well the Li-Polymer batteries work out. And I wish they included a Sony MemoryStick slot too (enough of those to merit inclusion). And yes, I am a big proponent of FireWire, and not including FW in the 13" MB is the mistake that prompted this shuffle and holding on to the unibodies.