This game is kind of a bummer. It was certainly enjoyable, but even the marketing material for this game felt nowhere near as powerful as previous ones. I still have the ACII E3 trailer stuck in my head, same with Brotherhood. The game may not have played in entirely the same way, and they may have been pre-rendered, but they were striking and rather beautiful. Looking now, the only real trailer I can find that emulates them is the one that shows pre-alpha gameplay, where they are maintaining a framerate that is unprecedented in the actual release.
I was actually totally okay with the game I had until I saw how smooth the game could be running, and just got incredibly bummed. It made me realize why so many game critics get uppity when something doesn't run at 60 fps.
Edit: Post-teaser trailer below. Were the actual game this fluid, I think a lot of people's gripes would have been addressed and it would have felt almost like an entirely different game.