Puckishly: it need go nowhere at all. As a matter of fact, we _do_ have something that is more 'visual' or 'symbolic' than written speech, and it has a critica

Puckishly: it need go nowhere at all. As a matter of fact, we _do_ have something that is more 'visual' or 'symbolic' than written speech, and it has a critical role in certain abstract forms of writing. It's mathematical notation (or, sometimes, symbolic logic) and it's already great. Thus, any sufficiently advanced visual programming environment is indistinguishable from rendered LaTeX.