Of course, if it ends up being a G45 class chip, it's not going to be much to write home about (performance wise).
This is the dirty secret of Fusion. Moving a dog-slow GPU from the chipset to the processor still leaves you with a slow GPU.
I'm interested to see what AMD and Intel end up doing with an on core GPU. It could be really interesting from a GPGPU perspective as you could eliminate the current need to ship things from main memory to GPU memory.
Unfortunately, a GPU tends to have ~150 GB/s of memory bandwidth while a processor socket has ~30 GB/s. Is it worth a 5x drop in bandwidth to avoid the PCI Express bottleneck? Maybe...