The NES example is not really a good one because it’s a created object and knowledge of it is complete, therefore replicating it is possible.
Even then, assuming all of this didn’t matter- I still don’t see how the mind maintains itself in a new body. It’s not as if a human mind is a static entity-it constantly comes into contact with the world through its embodied form and this reinforces and extends this notion of identity. Assuming you could emulate it on a computer, it would seem logical that the mind would change to adapt to its new body, thus no longer being the same self.
Ultimately any “transfers” will actually just be the creation of new minds, which IMO is more interesting anyway.