Maybe if you don't want to watch zombie movies anymore . . . you should stop watching movies that have zombies in the title! Were you really surprised that Abraham Lincoln vs Zombies was in fact a zombie movie?
Now I will admit that the horror genre has become over run somewhat by the zombie subgenre. But that's what's popular now so that's what gets produced. It's like how just after Friday The 13th came out in the early 80's, production companies started cranking out slasher films almost on a daily basis. Eventually people just got sick of them. This is the same thing, only with a different subgenre.
And I agree with everyone else, I don't like the term "zombie porn" either. First, it's a total misrepresentation of the word "porn". When I read the title, I thought this thread was about those XXX parodies that keep popping up, this time spoofing George Romero films. That's one twisted fetish. Kinda one step up from necrophilia (or maybe one step away from it).