My Response was confusing, i'll rephrase partly:
Generally observed, we are currently moving towards a more transparent system architecture, both on the surface (UI) and beneath the hood.
The usage of symbolic visual language improved the system towards better (network-)transparency and easy to understand UI logic.
Not only by the introduction of Symbolic Icons¹ but also through semantic ontology capable software technology such as xdg utils or dbus.
we hardcode less absolute features into our software (constant values, fixed strings) and create more scalable technologies, interdependencies, intercommunication (IPC), generative abilities (fuzzy search, etc) and more dynamic objects into our more and more modular systems..
The change towards symbolic Ayatana indicators makes buttons and widgets more dynamic. This all can be easily implemented with text based items e.g. via font-style, but we can all agree that it is much easier to use symbolic icons here.
Noam Chomsky is often quoted for his thesis about a universal grammar²:
We all have a higher awareness of figure and form hard-wired into us natively, which makes it easy to design a visual interaction language with symbolic visual metaphors, which every human being can intuitively understand, contrary to what many people on this list believe. It is possible to design a visual superlanguage, understood by every human.
i see this language rather in the usage of well designed visual metaphors, than in the highly conventionalized and cryptic written languages such as English, French or German.
The Sugar DE attempts this for the first time, AFAIK:
http://en.wikipedia.org/wiki/Sugar_%28desktop_environment%29