Just got done watching World War Z. Pretty entertaining I gotta say.
Certainly a more practical 'zombie' movie. A more realistic approach. However, I believe if something such as a "zombie" outbreak were to happen it wouldn't be as grand and catastrophic as movies make it out to be. It would be something that would originate in one central area but also be contained rather quickly and the transformation wouldn't be seconds/minutes or even hours but more like days (24-48hrs minimum). Not one thing that would spread rapidly and overwhelm countries and continents. More so something like smallpox or the black plague but would be dealt with rather rapidly and a significantly lower casualty rate. Unlike the plague with a survival rate of 15% it would be something like 85%. In our modern history probably the closest we'll come to such a thing is the H1N1 virus that was going around a few years ago. Even that was something that was contained and neutralized before any real damage was done. With the technology of today and the advancements of medicine true life threatening diseases that occur organically and or manufactured can be neutralized with next to no effort. The research and resources that goes into the study of all possible biological threats is just awesome to say the very least. Nonetheless, it is a theme that makes for entertaining TV.