This hydrogen thing seems to be just getting going so while the theory sounds great , the bugs still have to worked out. What makes it more interesting is that there is a lot of global interest, not just Asia. I assume that's the case because of it's storage potential to fill the gap for renewables which is the silver bullet in my view.
Your suggestion of local generation is a good one . I have already heard that idea before. I went to the Energy Storage Conference in Melbourne late last year so maybe that's why I'm in front a bit with my information. They discussed localised hydrogen, particularly for smallish industrial hubs. That could be where I heard about the already available infrastructure for transporting ammonia actually.
Obviously there is plenty going on behind the scenes with the CSIRO. I reckon that post the federal election we might see some bigger announcements as this will kind of fit in with Labor's renewable energy policy.
Assuming Labor wins the election of course.
Anyway, I'm following this hydrogen thing so I'll post more stuff as I come across it.