Ok, you saw the post J Cole from Humminbird posted when I questioned what that center port was going to be for. They got enough pins on that connector for it but we'll have to wait and see what the cable has when it comes out. Even if it does have the ethernet capability it'll likely be proprietory so only Humminbirds will read it and not PC's.
It could be handy if it has the power to share the sonar graphics for people fishing the front and back of a boat so they both can have a running sonar screen but you'd have to have a software way to choice a master and slave unit so the person up front would have control while up there.

WarrenMN