ATI's XGP technology (eXternal Graphics Platform) is an external graphics solution for notebook PCs. ATI XGP is designed to deliver enthusiast-class graphics performance, true multimedia upgradeability and multiple connectivity options, revolutionizing GPU performance on a notebook PC equipped with an external PCI Express 2.0 connector.
ATI XGP (eXternal Graphics Platform) Radeon 5830 Demo At CES 2010 - Legit Reviews
And the never-ending question is, pila pud kaha? The early XGPs didn't click for a few reasons; absurd price and compatibility issues. If this XGP from ati does hit the market, and will turn out cheaper than a single gaming notebook ( HD5870 ready laptops cost about 80k+ ) then this might be what laptop users are waiting for.