The interview is about Skyrim, he's not talking about future games here, only Skyrim.
“We get performance gains out of [DirectX 11], versus an older version, and there are specifics that [DirectX 11] does like tessellation and that kind of stuff; we aren’t taking advantage of that right now,” the Skyrim director told Ausgamers.
“But that doesn’t mean we won’t in the future, we just aren’t right now.”
He could very well be talking about future games here.
DX11 was confirmed though, anyone have a link to where it was?