I’m fairly sure it is just an API that allows you to use Java to access Fritzing parts. It currently doesn’t really do anything on its own as far as I understand it.
It seems more of an idea by someone more familiar with Java than with C++ and QT trying to get people involved in porting Fritzing to web technologies. Like tens of thousands of projects on Github it may not go anywhere.
I myself will be concentrating my efforts on the current Fritzing application as it works and if we abandon it you will only ensure it dies.