Well I could have asked for him to define his terms, because to say that metaphysics is becoming science is not clear at all. Are we talking about things which can be proven, or are we talking about accepting magic as real?
An illustration seemed more in order, don't you think?
And the fact is practical science is and always has been mixed with metaphysics and matters of faith to a greater or lesser degree (even if it is lesser right now). I don't expect there's any great epiphany waitihg to happen.