First lets talk about the evolution of zombies:
1. THE SLOW ASS VOODOO/MAGIC ZOMBIES!
Ahhh... Good'ol OG zombies. If you watch any of the older zombie flicks, these guys normally walk or try to run (off-balanced). Some may even have a different color skin (green was a popular choice).. Cemeteries, curses, and voodoo rituals were very common for their source and appearances (like in "Night of the Living Dead" which was a popular film).
Opinion: Theres no way humanity would lose to these zombies.
2. ZOMBIES BECOME MORE AGILE!
I'll be skipping decades of zombies and head into the Evil Dead/Resident Evil style era. In my opinion, this was probably the start of the zombie concept fever. Instead of curses and other cheesy mystical reasons, viruses and biological contamination become more popular. Although the zombies are still fairly slow, the creators take zombie infections to the next level. People become infected within a few moments if they're even scratched by one of these things. BUT humans aren't the only things to be raised as these viral creatures, dogs, birds, and other animals become tearing shit up too which makes which adds depth to these apocalypses making them more frightening (and cool ...if your a SADISTIC BASTARD)
Opinion: I think this could be quarantined. IDK depends on the source i guess. Oh and don't rely of the police!!!
3. ZOMBIES ARE F***KING ATHLETIC!!!
Alright Alright, lets get to the present n shit. Right now zombies are at their peak with video games and movies swarming the market (pun intended). Everything becomes fast-paced; zombies begin to sprint, climb, and even jump (thanks Brad Pitt). Infections are within SECONDS making survival quite an accomplishment (watch Zombieland for a rather entertaining guide). Viruses and other Bio stuff are still the generic sources of the apocalypse. The video games like Left 4 Dead even had a concept of adding mutations to the swarms. (super zombies with a specific ability). If these zombies could sprint like Usain Bolt with an endless stream of stamina, well.... no wonder this shit entertaining and fun.
Opinion: I'll get on this in the section below. Oh and don't rely on the military!!!