I think this color palette was definitely a lot more pleasing, the gameplay still looked very standard FPS. maybe KZ2 had it's own unique flavor, input lag and all, haven't played much of 3 other than demo to form an opinion, this looked maybe more responsive in aiming and moving overall. I like the art direction, generally like futuristic cities like that, it looked really nice, though nothing about this demo indicated it was anything more than just a pretty background (I hope someone explores this kind of locale for open world games in future, it's pretty non existent right now).
I was hoping they'd show a new IP that was said they were working on years ago, this was a bit disappointing to see instead. If you liked KZ you'll probably like this one too, can't see it if someone weren't into it now like it, KZ games always had pretty graphics after all and nothing else was any different here to pull someone who previously wasn't pulled into this series.
edit: I'm curious why it's not called KZ4 though, Is it because they don't want to make it seem you need to play previous games? how they are going to name the sequel from now on? only with a new subtitle? same for Infamous.