Fujifilm has not yet officially unveiled the X-A10, but these sort of registrations usually occur in the weeks or month leading up to the official announcement of a product. The question will be if the camera is announced/coming to the USA, which it is entirely possible that it does not.
The X-A3, which was announced a short while back was originally supposed to begin shipping on October 6th, but due to delays thought to be caused by the earthquakes earlier this year, the X-A3 was pushed back and is now expected to begin shipping around November 16th.
The X-A10, presumably, would slot in under the X-A3 in terms of specs and pricing. The X-A line has never really caught on in the consumer market here in the US, but with the X-A3, that looked like it may turn around with increased build quality and functionality.
It will be interesting to see how the X-A10, should it be announced here in the US, differ from the X-A3 and the other X-Series cameras. One would assume that if registrations are happening now that an announcement could be expected sometime in the next month or so. Stay tuned for more details as they become available.