At first glance, it's merely BF3, but fixed. From the HUD to the UI to the overall mechanics and the art direction. All the little touches that just didn't feel quite right, didn't quite add up in BF3? It seems to jell so much better this time around. It really shows that DICE had more time working on design, rather than just getting the technology behind it working well enough in time.
Looking at it more closely, it's also bigger & better & more badass. Objectively, Shanghai Rising is a first for gaming, and for longtime Battlefield veterans like me - a dream come true. I always wanted to wage war in this kind of metropolitan downtown area. It's full-on combined arms warfare with 4 choppers, 4 MBTS, 2 APC, 2 Attack Boats, and a whole bunch of jeeps and jetskies and whatnot. Parachutes can take you from C (the famous destructible highrise in the center) to anywhere you want quickly. Absolutely amazing design.
Haven't seen a commander yet. Dunno if it's even live yet. That'll add a whole additional layer of craziness onto it, with cruise missile strikes and the likes.
P.S. I refuse to use the other thread with the biased title as the feedback thread. 'Eff that.
P.P.S. You absolutely need to turn off post effect AA, and turn up texture filtering. FXAA makes it look blurry and crap, and texture filtering is cheap, and makes it look oh so much crisper.