I don't think NVIDIA and ATI will like a DX10 based one
What? They love it! 3DMark06 is DX9 Benchmark and you can't and shouldn't compare results from that to 3DMark Vantage or even 3DMark05 results. If you haven't noticed both vendors are selling DX10 cards - and have been doing that a long time already... :)
Every new DX has it's own dedicated Benchmark to test that DX generation features, always has been like that and will be in the future.