Sure, and untraceable communications - you put a wire on a spy and they're radio-ing everything home with nothing to indicate it. Battleships get their orders and there's not even a chance of interception, let alone decryption. Do these illusory tunnels bypass things like Faraday cages? What about a ton of mass?

There's a lot of military and consumer applications here, and a ton of potential privacy benefits (an unseen wifi network, who knows -- the list goes on). If you want to get rich off this, brain scanning is not the first market to pursue.