It doesn't get more real. Because, as a person, you are going that way, out, and you feel it physicly. The sensation is like no other you will have experienced in your life, and so you might not go too far at first.
A dream is a dream, and it can be absolutly amazing. If very lucid, you could definitly say it was real, how was it not...like I've had some great surfing dreams, so real that to me it was a full on experience. Im aware it was in my "mind".
But I've been working on astral projection, and not only may it involve many different things, it can feel from deeply horrific, to endlessly enlightening.
I know myself that I dont look at life the same as before my experiences.