This is a "leaked" build and has no connection to any authorized channels in so far as how it behaves with respect to installing, so I wouldn't attempt any predictions as to how the actual normal releases through slow or fast rings might proceed.
Although I suspect that in the final analysis it will almost necessarily behave something along these lines, as the only comments I've seen regarding clean installs from ISOs with the July 29th release is that you will be able to do so, "after the upgrade".
I think that perhaps at that time there will be some kind of binding with a previous Product Key along with some Hardware IDs, to make that possible (perhaps even associating those with your Microsoft ID as well, IDK).