A japanese site has slides from the amd presentation here:
http://pc.watch.impress.co.jp/...2008/1002/ceatec09.htm
I am guessing that this will be the RV9XX generation of chips, presumably at the end of next year. I thought the RV8XX generation in the middle of the year was a shrink to 40nm and as that is a very new process it would be unwise to try and add too many new features at the same time. On the other hand i read that DX11 will not require too much new hardware stuff, the main part was a tesselator which apparently ati already has.
I guess its all up to microsoft now whether they include dx11 in vista or try and force an upgrade to windows 7. Given a free rein i imagine they would try to force an upgrade, but if they think their api is under threat might make it available under vista as well. They cant be too happy nvidia hasnt bothered with 10.1, might be a sign along with physx/cuda that nvidia is trying to break away, to form their own standards free from MS's influence.