Text itself is a form of visual programming. We really have only two styles of visual programming: 1. Some sort language formed by left to right based alphabe

Text itself is a form of visual programming. We really have only two styles of visual programming: 1. Some sort language formed by left to right based alphabetic symbols in some pattern called "grammar". There's an almost infinite amount of possible grammars 2. Boxes and lines. Where boxes represent state or function and lines connect the boxes and state together. There's less formalization in this area so the axioms are vague but it can form something of a "grammar" similar to the above. That's it. It's not a space that could really use innovation. It's the fact that the entire space has never innovated. We've just been drilling down on a very specific and biased way of seeing the universe. The concept of a compiler literally illustrates how deep it goes and how tied the idea of a program is to a "language".