My guess is the marketing plan would revolve around new 40nm "price performance leader" cards using the same DX 10.1 architecture they announced for mobile. Only desktop versions. Note that those cards support GDDR5, too.
They'll downplay the DX 10.1 support. They'll play up DX11 Compute Shader support. Because true, DX11 has a SM 4.0 and SM 4.1 path for compute shaders that will run downlevel on DX10 class hardware. It also has a more robust SM 5.0 compute shader path - more shared memory per thread group, atomic operations, double precision, Gather 4, and other goodies not in the SM4.0 path.
Of course, there will be heavy promotion of PhysX and CUDA.
The message that will be implied, if not stated outright, will be "you don't need DX11 to make your games look better when there are hardly any DX11 games out or coming soon, and PhysX does more to make your game look better anyway."
At least, that's what I expect the marketing plan to be. I don't expect them to start talking about GT300, especially if it's a giant chip and they won't have $150 DX11 cards anytime soon.