The primary use of Hamachi is to virtualize a private network over the internet in a manner that is simple and setup free. You actually have things completely backwards. Hamachi and its predecessors are IPX emulators over TCP/IP net connections. Essentially connections and computers work twice as hard to establish and maintain a connection together in an IPX emulation. Why people say they are lag free is beyond me. They probably would have a better connection but can't configure port forwarding so settle for that instead. Now Kali's use was for games that ONLY had LAN support to be used over the internet. I think that'd be a best replacement for your statement. That is an ancient relic from the past that most people in this forum have no clue about so I will leave it at that. My best guess though is that is what you were thinking with that statement.