D.D. Shade at Lost Books asks: What is Speculative Fiction? "...we need a good way of defining Speculative Fiction other than saying, as Damon Knight said of science fiction, that Speculative Fiction is that which we point to and say it is Speculative Fiction."
TexasBestGrok points us to these cool Model kits that Might Have Been, a set of realistic (but faux) model kit boxes which you can actually order and showcase at home (or wherever it is one showcases models). My favorite: Balok from Star Trek. Clint Howard always creeped me out.