In fact when your lightning node is hosted at home, when you want to connect it to an app on clearnet like lnbits, satdress etc... You need to use a VPN connection or open some port on your router. 

Nostr is used to create an asynchronous and bidirectional channel. Much more, you can use the wrapper with a lot of app (need some integration) with tightly coupled scheme. 

I love the innovation coming out of this.

Right now, I don't quite see why we need a general LN wrapper running on nostr, but it is definitely intellectually satisfying and I do hope people build on that.