Given the positive reviews, and the forum inches this class of speaker have been generating over the last few years it would seem odd if a few of the bigger companies didn't add some. Not that logic and hifi are friends.
It's potentially a great engineering challenge /race, who can produce the cheapest, smallest and prettiest design that meets the flat on axis, flat but attenuated off axis spec.[/
Don't know how easy it would be to duplicate, but I'd bet if even a full range passive version could be offered for $5k or less, it would rapidly attain classic status.