What are the consequences of achieving physical immortality?

[kanonathena]

I remember reading about cases where a woman in a long coma appears to have not aged a bit, but as soon as she woke up she become a old woman in a matter of days. I heard David Wilcock in interview talked about something called zero reference point, which is when people begin their incarnation.

In Stanley kubrick's A.I. Artificial Intelligence, at end of the movie the kid's mum was cloned and said to be able to live a only single day because timeline can only be used once, something like that.