Well, it appears that this Acer notebook is non-upgradable (No mention of it anywhere, at all, companies make noise when they have upgradable graphics, with press releases and marketing. See Dell or Alienware).
So that brings the question, who cares if it's PCI-Express? PCI-Express for graphics has no performance improvements. In fact, even top-of-the-line graphics cards, if I recall correctly, run just as fast on AGP-4x as AGP-8x. With PCI-Express having the unidirectional bandwidth of what would be AGP-16x, it's overkill with no benefits.
Now, the PCI-Express solution that is scheduled to replace PCMCIA, that's something. As are PCI-Express slots for expansion cards, as the PCI bus is a dog.
But PCI-Express for graphics, whoop-tee-doo, it has a zero-performance increase, and I have zero-interest.