Is this really that useful?
Normally you use a quoted path in the Terminal. This is either PF’s “UNIX” or “Terminal” path, I don’t know. And the backslash-escaped one will then be the other one.
HFS can come in handy, but if you are using Script Debugger you get any desired path formatting any way. But it’s not useless.
Windows? Well…
URL: Can be handy, but they missed the chance to add a file reference URL option here. This would have been a great and (probably) unique thing.