a soul i still an important concept and good area of debate if we ever develop star trek style teleportation. if you strip away all the various religious crap, your "soul" is basically whatever makes you, "you". it is what is controlling your body, thinking your thoughts. there doesn't need to be any magical spirit involved in this concept.
when you come out of a star trek style teleporter is it actually you that comes out complete with your stream of consciousness? or is it just a really detailed copy that looks like you acts like you and thinks it is you and the previous you was destroyed and no longer exists? i don't know about you, but i definitely wouldn't ever voluntarily use a teleporter, except as a last resort. either it transfers the "soul" and everything is fine or what comes out is a very detailed duplicate that looks and thinks exactly like you. this duplicate since it has all your memories would think it had worked even if the original you ceased to exist. i am not really afraid of death but that also doesn't mean i want to cease existing. teleportation just seems too risky.
i think it is more clear if someone were to make an exact clone of you including your memories. this duplicate isn't you, you don't control it you don't hear it's thoughts. it may look like you and think like you but it isn't you.