Don’t fall for it @lud - I did (after seeing @hauleth’s pics in this thread and on DT - as well as @Dusty’s pics) but ortholinear AND tiny is a lot to get used to. You can’t deny they are beautiful and the cool factor is definitely high, but I would recommend trying to find someone local to try theirs before purchasing. I knew it wasn’t for me as soon as I tried it (maybe I should have given it more time but I’m pretty sure I wouldn’t have changed how I felt).
I think if I go for a non-Apple keyboard next I would focus more on ergonomics and practically and to what feels natural to type on (so no unnatural raising of the wrists or placement of arms or extension, etc).
When I think about what kind of keyboard that might look like (when sitting at a desk) your elbows are usually further out than your hands, so your fingers extend in a triangular line towards the apex, with the most accessible area forming a heart shape. So with that in mind perhaps only smaller adjustments to the standard keyboard might be all that’s needed? (Perhaps two additional smaller keys under the space bar and the lesser used keys from the far edges (esp on the right hand side) moved above the top row (or inserted before the even lesser used top row keys). Then it could be made into a splittable keyboard for even more custom fitting/placement.
Shall we design our own perfect keyboard? 
I’d echo my thoughts above James - I think ortholinear keyboards feel very unnatural to type on (for me anyway) unless they were angled perhaps..
