I'm sure it is an interesting engineering exercise, but I struggle to think of a situation where I would fire a browser to use the terminal instead of just opening a terminal.
The name might be a hint as to the utility. If you wanted to display your terminal on your massive television using, say, Chromecast, you wouldn't have the option, but you can "cast" a browser window.
I guess you could run the program in one of your private servers then do a reverse proxy to that from a public server. Voila: Easy terminal access to your private servers from everywhere!
Not a good idea from a security standpoint though...