You may well be right, Aidan, that this will quite a limited update but, as I think was mentioned earlier in the thread, it seems like a lot of effort to go to just to add the extra drawbar faders and not to update any of the internal sounds.
I could see them continuing to make the SK1 and SK2 and offering the SKX as a more premium product for those that want the updated sound of the XK5 but in a slightly cheaper, more compact and lighter package.
Although the XK5 hasnt been out that long, presumably Hammond would be keen to exploit the R&D they put into it with other products as soon as they can. And if they pitch it right price wise, they can avoid cannibalising either the XK5 or SK2 sales.
Cheers
John