You do a lot more moving
I hadn't really paid a ton of attention to Sunset Overdrive's multiplayer component. I figured it was just another co-operative experience where you hole up and fight off some baddies with your buddies. Rah rah, we've been here before, right?
This video makes it look a lot more interesting than that. All the fast movement combined with placing traps seems like it brings something different to the table -- especially with eight people running around. The seamless integration between single- and multiplayer (just hop in a photobooth!) and quick scenario selection certainly help add to the appeal. This might be a game where I don't just completely blow off the multiplayer side of things.