No, the presentation is not openly available I fear. Don't think NVIDIA will that allow again after recent "leaks" due to such stuff.
That ATI has not written PTX capable drivers yet, I think, you already know.
NVIDIA is not preventing them or anyone else with SM4 chips writting their own drivers thought. As mentioned they use a tool that seperates CPU and GPU code which anyone can buy (DGB was its name I think, not sure as it was of little interest towards CUDA, its a thing mainly driver devs need to know) and the PTX compilation is done with an open source compilation solution (Openxxx64, can't remember the xxx part anymore).
The whole API documentation etc as well is freely available not only to licensees.
That ATI has not written PTX capable drivers yet, I think, you already know.
NVIDIA is not preventing them or anyone else with SM4 chips writting their own drivers thought. As mentioned they use a tool that seperates CPU and GPU code which anyone can buy (DGB was its name I think, not sure as it was of little interest towards CUDA, its a thing mainly driver devs need to know) and the PTX compilation is done with an open source compilation solution (Openxxx64, can't remember the xxx part anymore).
The whole API documentation etc as well is freely available not only to licensees.