It's there on the website in the part I quoted, 2nd sentence.
Wait, the part you quoted only talks about how there will be a specific solution for backups, not save-transfers. The solution for save-backups was talked about already in the Direct as you mentioned but I don't think they said transfers will be possible in any way. The only thing the quote from the US website says about transfers is they won't be possible, not that there will be a specific solution for NH, which is only stated on the German one for some reason.