What is Post-Lovecraftiana? Until I write an essay establishing it further, let's frame it as a genre that the author could not envision fully, but that is tied to some of his miscegenation concepts come to fruition.
It is slightly different from Lynchian perspective because it does not attempt to have artistic merit but instead is satisfied with existing as a spectacle (a word similar to 'tentacle' which is not accidental). Instead of marble clad, slanting cyclopean cities you have a concrete suburban framework moving from parking lot to suburban housing to parking lot to mega malls. Sugar is the spice of life and around you waddle shoggoths and corporate cultists obscuring any discourse that would challenge the multicultural society making leaps and bounds towards its ultimate goal. What that goal exaclty is represents the fundamental tenet of this nascent genre.
You can discuss it here. Or not. It's here anyway.