To put it another way, in 7 years time you will still think of yourself as being the same person, although every single molecule in your body will be different to the ones currently there. The molecules that currently make up your body will all be discarded and scattered everywhere.
And MeBeJedi - you claimed it was your right. You're the one who made that claim, deal with it. DarthS, small changes made using the original material and nothing else do not tend to bother me. It's just looking at the same thing in a different way.