The idea is a teleport mod system like in Matrix, you place a phone in your house and more phones around the world, every phone has a number, that way you can call any phone number and be teleported from one phone to another.
I think this could be useful because you can travel long distances easily. I play in singleplayer most of the time and I use the /teleport and /home command but it feels a little bit like cheating haha. With an expensive craft for the phones this could be a well balanced transport system.
I don't have the skills to make this mod, I hope someone find it interesting enough to make it happen.