At long last, Nvidia may finally adding DirectX 10.1 support to its videocards, assuming Fudzilla is right on the money. According to the news and rumor site, Nvidia's GT200 will be refreshed to a 40nm manufacturing process and the new chips will sport DX10.1.
To date, ATI has been the only one to offer DX10.1 support on some of its videocards (yes, we're completely ignoring S3's Chrome series), a minor extension to DX10 that thus far hasn't meant much for gamers. To to fuel the conspiracy flames, that could change with Nvidia jumping on board. Remember that DX10.1 instructions did at one point show a performance boost on ATI cards in Assassin's Creed, but after a patch removed support for the instruction set, some accused Ubisoft of bowing to pressure from Nvidia after the GPU maker sponsored the title with its The Way It's Meant To Be Played program.
In any event, it looks like refresh will come on the tail end of summer or early fall.