There are several first looks at the new cities, zones, and architecture of Wrath of the Lich King that we haven't seen from Blizzcon. This also includes several mobs that have not been seen before. Zul'Drak is reminiscent of Zul'Gurub, and looks quite new and refreshing. Sholazar Basin is a cross between Stranglethorn Vale and Ungoro Crater, heavily influenced by Troll architecture.
We are also presented with vehicle combat in the Sholazar Basin video. This is simply amazing. The video shows a gnome flying machine contraption shooting missiles at other flying mounts, and then a gnome ejecting and floating down to safety in a parachute. Grand Theft Azeroth.
In the Borean Tundra video we see a beautiful look at the new cities for both Horde and Alliance players. There are also images of Dragon kind, similar to what players experience during the last leg of the Onyxia quest chain from pre-BC. Also included is a gnome city, much like Area-52.
Check it out now, and watch for more detailed analysis of the video and all the other news as the day goes on.