[jiggyboy]

It would be somebody just like you, but not you, in the same way that a received fax is just like the original paper. You’d be dead and gone.

[Erasmus]

If it were a truly exact replica, the replica couldn't tell it was not the original. It would be a true Doppelgänger situation.

But I don't think it will ever happen, because if Quantum Physics is true, a mind cannot be completely duplicated, even in principle. The situation of sending confidential unbreakable information using quantum principles is analogous.

I pondered the question, "Assuming that you could be copied in an allegedly foolproof manner into another newly created instance of yourself, and that your original body had to be destroyed in the process, would you do it?"

Not I.

A colleague tipped me off to a movie on this theme that came out a few years ago: The Prestige.