It did cross my mind that it could just be a kind of validation investment, to validate the Trump "investment" in Intel as a smart move (i.e., "see, Nvidia also thinks intel is a good investment), but the announcement did seem a bit contrived for that.

I am also thinking that it may just be more of a "everyone scratching each other's backs." Intel avoids anti-trust/monopoly investigations, Intel is saved for all the institutional and political stakeholders and Nvidia floats an artificial competitor to make them look less like a monopoly, Intel stays alive, etc.