Obviously we can all agree that a discrete Geforce mobile GPU is optimal. But at this point I would be shocked that they would add one as an option versus just going with IGP's. But I think arguing for powerful graphics isn't realistic based on the platform.
The last time they did that on a mini, it was still quite limited. The 6630 might have allowed for a bit of gaming, but the ram wasn't sufficient for programs that leverage the gpu for computation, so it was somewhat limited.