I'd imagine that the idea for this project was conceived about the time Jens started planning for the Reloaded mobo (speculation on my part here, but it makes sense).
However for various reasons they fell behind Phil's Kickstarter and now the market is more saturated than ever I guess.
My render shows a case that can take any Amiga mobo up to A1200 size and also be generalised enough for all kinds of other projects.. mini itx stuff, standalone Natami computer and what not.. (yes that's the Natami logo in the render ;-)
The case is simple enough to not be ridiculously expensive to manufacture and while a niche, it is not that limiting actually.. you could fit 2 mini ITX boards in there (a PC and Natami in the same case ;-)
Also, a separate keyboard cuts a lot of development costs...