It can be said literally, or just mean goodbye in different circumstances. For example, if you're parting with someone whom you have plans to see later that day, you can interpret it literally. It can also be used in a sarcastic tone to imply that you won't see the person any time soon.

i agree about that.

I just wanted to add that if you have specific plans to see someone, you can just say 'See you soon', 'See you tomorrow', 'See you next time', 'See you then' etc. By the way, 再见 literally means 'See you again'; it's the same concept in English.