alt Hacker NewsI kind of wish we had HTML but for GUI. Imagine if you had a "gui" flag in terminfo and you could send an escape sequence on stdout after which you could send out screen updates as a stripped down form of HTML on stdout and receive events on stdin. I mean something that can describe the simplest bog standard Windows 95 application with a menu bar, side bar, dialogs, buttons, and proportional text. Otherwise we could offer a GUI for applications over SSH by having the terminal open a local TCP socket connected to stdin/out and launch the user's browser, implementing the most barebones CGI.
HTML does describe GUIs though. Browsers are engines that turn a text description of a GUI into a rendered GUI.
I get your point, it does feel like there's something different, but I'd suggest that there is no black and white line, instead there's a spectrum, with fully native local UI at one end and fully declarative remote GUI at the other end. HTML and the web exist somewhere towards the latter.
There have been many attempts at points all the way along that line though, and every point comes with trade-offs. Performance degrades, OS-native components are eschewed, programming gets higher level, etc.