I never finished World War Z. Had the book but left it at a friends place and never got it back.
That said, I don't have much to base this off of source wise but I am interested. Mainly to see the way the hoard functions. Looks very flowy, like water, or as QP said, a swarm of ants. And, while, zombies are tired and played out, even fast zombies, that behavior isn't something I've ever seen handled before. At least not in the volume that is being suggested by those brief moments.
Did the original version, with the travelling reporter, garner more intrest from me? Yeah. Does it suck the source is seemingly being butchered for the name alone? Definitely and for those that were looking for something closer to it, that's gotta sting. I'll still probably see this though. It helps I get free movies but I would undoubtedly pay for this one if I absolutely had to. 28 days later is my favourite of the genre, while not technically zombies, and so far this feels like that, albeit if Jim had been around in the first days of it and the outbreak wasn't localized to the UK.