Cool article, but I am not a particular fan of using lousy metaphors from physics or mathematics as a way to give more credibility or importance to ideas (regardless of the intentions, this is the result those metaphors end up having on some people) - the ideas should stand on their own. The meta-circular interpreter is certainly beautiful, but it is not clear to me if it stands among Computer Science most important results (as Maxwells equations do in Physics) and why would someone count it among those. I am not saying there is no ground to it, maybe there is, but I would like to see some more justification for calling it the "Maxwells equations of software".