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The one obvious place where this could make for a great chip is an Intel CPU with Nvidia integrated graphics in a single chip. This, of course, will probably never happen, partly because Intel isn't likely to be willing to pay what Nvidia would demand, and partly because Intel CPUs are built on process nodes not at all similar to Nvidia GPUs, and this would create all sorts of headaches. AMD struggled mightily to get a high performance CPU and GPU onto the same chip, even with the option to design a process node around the need to have a high performance CPU and GPU on the same chip.
Apart from that, there aren't any obvious Nvidia licensees. AMD has their own GPU architecture that is just as good as Nvidia's, so they have no need to license Nvidia's. ARM licensees would be basically recreating Tegra chips and trying to compete with Nvidia in the same market. Nvidia is already trying to put high end GPU chips into any market that they think might plausibly want them.