If you didn't get to play in the BF4 Beta, you missed out on all the crazy action happening before the game released. With skyscrapers falling, streets collapsing into basements, choppers weaving in and out of tall skyscrapers trying to take you out, there was almost too much to take in!
The Battlefield 4 Beta closed on the 15th at 10am. I only played the PC version, and saying that, I didn't notice any major issues other than the occasional crash during the loading screen. The graphics seemed on par with BF3 graphics, although the developers have said the final game will unlock the ultra settings along with tweaking the current graphics. The game never seemed to stutter either. I was getting a consistent 60-70 FPS during matches with a first gen i7 quad-core 3.2 GHz, 12 GB RAM, and Nvidia GTX 780. Overall, I was very impressed with the quality of the beta and it just makes me more excited for the final product when it comes out soon.
DICE is adding a lot of different changes based on the feedback they received from the beta. To get more info you can check out the changes they are making here