I think this is implying they are going to go with geo-locking through IP. So far you couldn't change your location but you could still use your nnid anywhere.
That's not what it says at all. It says that if you move to another country you will not be able to change your NNID to match your location.
What they are trying to say is that you will not be able to use the native eShop in your new country without a new account/device. You are already locked in to US/EU/JP region settings when you buy the console.