1)you can kill birds, they drop feathers.
2)you can craft from alot of things, like i posted earlier take wolf skin and some gold and you can make gold dagger with wolf skin handle.
3)bunnies are verry fast and hard to kill (the guy that worte about it said he gave up)
4)there is a trap that will drop alot of stones from the ciling at once
5)NPC will speak to each other on different topics depends of what happening in the world, if you did something epic, you will hear npc talk about it.
6)every demo topic i read they claim that voice acting is great and they never heared during thier play time a npc that saying the same stuff over and over again as in oblivion.
7) some gaints are hostile and will attack on sight.
8) Some guy who played the game claimed he was able to talk to some of the bandits before they attacked him, as they will not attack on sight.
NOTE: i do not lie i posted the same stuff i read from different sites, i took it all from people that played the game and worth about it. it will be impossible to bring all the sources.