hmm, actually, you got a point there. emacs could be the like that graphical terminal, except for now it is still stuck inside a traditional terminal itself. even the GUI version of it is mostly just looking like a terminal, not really taking advantage of the potential of graphical elements. we would need a real GUI and support for exchanging structured data with external commands. for now emacs is still kind of its own world.
> even the GUI version of it is mostly just looking like a terminal, not really taking advantage of the potential of graphical elements.
Emacs is text based (mostly), but customization happens through the the concept of Faces, not ansi escape codes. You can then embed properties in the text objects and have them react to click events. The only element missing is a 2D context that could be animated (if it's static, you can use SVG as Emacs can render it).