Imagine if this could be used for communication (probably not, but you never know). That means you could have communication between two mechanical entities at t

Imagine if this could be used for communication (probably not, but you never know). That means you could have communication between two mechanical entities at the opposite sides of the earth without worrying about pesky radio wave things like line of sight and increased signal strength requirements over a distance. But a more appropriate answer is that there probably could be some sort of application, but unless we start building stuff we won't know what we're capable of and will be unable to engineer cool gizmos that use it.