Pure Lovecraftian Horror vs. the Cthulhu Mythos

Four decades separates August Derleth's TALES OF THE CTHULHU MYTHOS (1969) from Ellen Datlow's LOVECRAFT UNBOUND (2009) and S. T. Joshi's BLACK WINGS (2010). Over these decades there has been much discussion concerning the nature of the Mythos (and who invented it) and the nature of pure Lovecraftian horror. As editors and authors of these so-called "sub-genres," do we see a new direction in the books being edited and the stories being written that are influenced by H. P. Lovecraft?