So, basically, it will use the WebRTC protocol for this purpose.

Btw, this protocol can also be used for real-time synchronization of text, voice, and video, yeah you can do some very wild stuff with this.

Here's an example with Sharedrop for file transfer. nostr:note1h7u8a7d9z0m5wqadhn049qyu7shqr5ckjsw3944t0ehjkrw3jufqexude2