I'm gonna guess he's referring to the fact that the Gamecube had all kinds of hardware features (such as emboss bump-mapping) that went virtually unused because developers simply ported from the PS2.
i bet you meant EMBM instead of emboss there. but i completely agree with your point, with the single remark that the xbox actually got a significant number of PC ports, which although based on similar GPU features, suffered from other serious drawbacks of the platform, among which major architectural screwups. but that's totally off-topic.