matrix is a fantasy or a science fiction, for sure. if you closely look at the quantum mechanics and its uncertainty principles, then the theory of relativity and its space time and gravitation curvature, then look closely at the m-theory (unified string theory), we will clearly understand that the universe works on the way of a chance when everything we know exist in the known 4 dimension and whatever is unknown are all on the other dimension that our physical eyes cannot see. and everything (including matter) are made up tiny bits of quarks (evident) and even smaller strings (hypothetical). strings are so tiny that current technology is like extremely ancient to even detect it, forget seeing it. but, they could be so large that it can form a brane around any given universe to separate (linguistically) each other from each other.