My bet is that "our existence could be a very sophisticated computer program (simulation)" where the location of our consciousness is in a place external to the environment we believe we exist in.
If so, for whomever we may really be, the current life we are "playing out" may be just one of many to be selected from.
Guess its possible that the consciousness of others may also be "playing out," but only with a close contact with ours, seems valid.
Perhaps when we come to death we will awaken and say "Man, that was some trip."
For my current life "playing out" I will say "Man, that was some twisted screwed up trip not to replay."
:)