While it still seems as if it runs a Core2Duo processor, it does appear as if the graphic card has been updated. We will keep you informed as we discover more differences. In the mean time check out the Apple Store
It seems as if the new mac, actually has HDMI, even though many (us included) argued it would be a long time before this would happen. Now There’s also a built-in SD card slot, this is great news for many photographers. Furthermore the power supply is built in. So there’s no bulky brick anymore!