We actually have external graphic interfaces for notebooks, using an external PCIE cable. The technology is called XGP; here's an example of a product :
The problem is:
- The Amilo use a technology of fujitsu
- The technology isn't supported by all new AMD Notebooks
- You have to buy this notebook so that you can only use it with this "old" grafic card.
- AMD need an own solution for all of theire notebooks
- AMD need an external case, which is compatible to all (ATI) grafic cards and AMD should offer a small solution like the amilo, too. But with the newest grafic chips. ( ATI 4870 / 4890 )
- The people don't need a desktop system anymore. This solution is a 100% desktop replacement.
- The system is mobile and it save energy costs. ( Lighter as a solution with an integrated highend chip, if you don't need the grafic power.)
- Studies don't need two systems anymore (No second device from a competing company)
- Perfect for all LAN partys
With this solution, AMD could sell all of theire notebooks with the cheapest onboard grafic chip, or later with the gpu core in the processor. (Fusion)
If the people buy a new notebook they could use theire old grafic card. (So they could upgrade it at any time.) That is a big cost advantage for AMD.
The connector and technology used for external graphics is available to all AMD customers. We don't actually make the laptops though, so we do not control whether that external connector is used.
The rest is a chicken-and-egg issue; as more laptop vendors include the connector then more external boxes will be made with newer and faster GPUs.