If that were to be the case I assume people would try to aim for PS4 or PS5 first.Yes, that is another whole thing and a potential exploit. But it is only a proof of concept at the moment, and like you said it requires hardware stuff.
I believe that it is possible to reverse engineer how the random number is generated for the scrambled keys, but I'm not sure as Sony did their homework and revamped all the PS3 security.