Personally, I like zombie movies. I grew up watching them when they were still the hobbling, slow moving horde of crazies. As fun as those were, the remake of "Dawn of the Dead" is one of my favorites, as is "Shawn of the Dead." Why? For starters, they're both very well made, but mostly because they took a unique approach to a very stale ideal.
Not that I'm complaining much, you go the other direction and keep breathing new life and ideas into a concept and you get the situation that we have with vampires. We start with Bram Stocker (disregarding all the mythology before that and stick with what popularized the idea) and watch over the decades the creature go from a romanticized terror of the night to either a complete and total rampaging monster (30 days of night) ,or a sparkly vegetarian (vamp version - and we all know what I'm referring to here). Is there anything wrong with all this? Not much, other than when you go see a movie, you never know what exactly you'll see with a vamp movie.
Zombies, however, have had little change since their movie debut (again, disregarding all mythology) and what changes have been made are for no other reason to make them scarier. Why else would a horde of human-eating, nigh-invulnerable, undead need to run to catch someone? Most of these movies are about people locked up in some house, mall, facility, or whatever and the zombies are getting in. Plotwise, not much reason for zombies to gain speed.
These kind of things run through my head when I watch movies. I wonder why people do what they do and I try to piece things together logically in my head. I realize this is a very silly thing to do with movies, especially these sorts, but it's a fun puzzle for me and has given me some ideas that I plan to use, or, in the case of zombies, have used. Book 1 has a 3 chapter section on the topic of zombies. the first 2 chapters I wrote as a "Okay, here's what we all know - typical zombie piece" and the third is my way of reasoning the unnecessary changes in the zombie genre. Much like the rest of the book, I have a big question that I try to answer with the writing - Why do these changes in the genre have to be separate, can they be handled in such a way that it becomes one cohesive package, rather than a new direction of an old concept.
Please comment below, I'm curious what others think and I will respond. :)