And HOW exactly would it work in any case?
It's all speculation, as no one has shown that the Shark can work, at all!
But, as I understood it from the early promotion, basically, the Shark would take over the PCI, and most, if not all, of the original Amiga would be disabled in this mode.
Since that point, several nebulus announcements have been made, and then, of course, came the baseless speculation upon those announcements. I think it was recently discovered, that upon the release of OS4, the almighty Shark shall descend down to us, directly from the Heavens. Upon its arrival, the almighty processor shall eliminate all suffering on Earth. Or something like that. :-D