Still, having a separate markup/scripting language for the UI layout has become an established paradigm for anyone writing apps that need to run in a browser.

Still, having a separate markup/scripting language for the UI layout has become an established paradigm for anyone writing apps that need to run in a browser. side note: this action I guess has prompted the creation of "visage" http://steveonjava.com/accouncing-visage/ http://steveonjava.com/accouncing-visage/ as a JavaFX scripting alternative.