Disclaimer: I am not the one who wrote this article, i am just posting this from another website/forum. posting news!, i take no responsibility of this article, this topic wasn't intended to make anyone angry, upset, dissapointed, etc.
According to Donanimhaber.com, AMD is working on 2nd generation DX11 line-up and it will be based on completly new GPU architecture. Donanim Haber also underlines that, next-gen cards will be launched in 2nd half of this year as Dirk Meyer (AMD' CEO) said before. Still there is no official infos about the technical details of new architecture but some people speculates that new design supports MIMD desing approach.
Sources:
Next Generation ATi graphic cards coming 2nd half of the year - PC SHOW 2010 | COMPUTEX 2010 | VRForums - Singapore IT & Lifestyle
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If this is true.. 6 series already? O_o
Nvidia's Fermi isn't even out yet