Web based software versus Winforms (which is AdvancedHMI) is a completely different paradigm of software. In order to have a web page respond back it would require some kind of code embedded in the web page. For this to happen, either a piece of software that rides on top of Visual Studio would need to automatically write code or the developer would need to hand code the web pages.
In other words, an interactive web page to work with AdvancedHMI would be quite a large undertaking, hence that is why it has not been done yet.