My thoughts, at a glance of that photo:
1. Once again, Kel-Tec is cranking out stuff for a virtually non-existent market, hoping to CREATE a market;
2. Looks like something that would be better suited to having a pistol brace or actual stock attached to it. Given the current situation with the ATF regarding pistol braces, I don't think that'll bode well for this, if that's the case;
3. A rifle version would not only make more sense but would probably sell better, anyway;
4. If 5.7 ammo had more manufacturers (there's only, what, two or three?) and if P90 mags were more plentiful (does anyone besides FN make them at all?), I can see this maybe having more appeal. Again, a super-duper small niche market;
5. It's only a question of when and not if these start showing up in sci-fi movies/TV shows because that's one seriously Star Wars-lookin' hardware right there.