Just because it was easier than writing up some more entries for my top 100, I put together a list of American horror films from 1980 which prove Hitchcock didn't take the genre to his grave. Not that I had too, of course, as the statement is ludicrous. However...
The Evil Dead, Evil Dead II, Drag Me To Hell, A Nightmare On Elm Street, A Nightmare OnElm Street 3: Dream Warriors, Wes Craven's New Nightmare, Joy Ride, The Others, The House Of The Devil, Scream, Scream 2, Urban Legend, The Faculty, The Blair Witch Project, The Devils Rejects, Saw, Saw II, Trick R Treat, Land Of The Dead, Final Destination, The Dawn Of The Dead (2004), Sleepaway Camp, The Burning, Happy Birthday To Me, Near Dark, The Hitcher (1986), From Dusk Till Dawn, Grindhouse, Cabin Fever, Ring, Frailty, Hollow Man, Hide & Seek, Poltergeist, Fright Night, The Fly, The Thing, An American Werewolf in London, Dressed To Kill, The Fog (1980), Maniac, Maniac Cop, Friday The 13th (1980), Friday The 13th: The Final Chapter, Friday The 13th: Part 6, Henry: Portrait Of A Serial Killer, The Hidden, Halloween III (I know I'm in a small minority here), Prom Night (1980), Cherry Falls (and here), May, Scanners, The Stepfather (1987), The Entity, Arachnophobia, Stir Of Echoes, Sleepy Hollow, Interview With The Vampire, Lake Placid, Needful Things, Wrong Turn, The Mist, Open Water, The Shining.
Now, I don't expect anyone to agree with all those choices. Neither do I think I've listed every applicable choice, but I think there's more than enough to convince pretty much anyone that American horror has been far from buried since Hitchcock died. Not that he had much to do with horror, anyway.