Wank at me for saying it, but I’m not sure. Look at those bestseller lists, and only 2 or 3 of the top 10 CoGs and 2 of the top 10 HGs are “fantasy” in the sense of being set in another world with supernatural/magic elements. Superheroes, vampires, zombies, and samurai are all at least equally popular if not more so.
If you want to draw the genre lines to merge most or all of those into a single “fantasy” or supernatural genre, eh, fair enough, but I don’t think that’s particularly illuminating. Might as well throw in sci-fi, call it “speculative fiction,” and incorporate basically all of the bestsellers that don’t rhyme with Pin Jar.