@Kyu
It was awesome! I only saw a bit of it, but there are premade towns now. Like you spawn IN a town. I didnt see NPCs but apparently there WILL be in the towns. ANd more towns apparently spawn around the world.
There are also now animations for eating and using a bow. When you hold up a pork chop you like OM NOM NOM it and your food bar goes up. And when you use a bow you have to pull back the string, and the arrow moves farther and shoots stronger the longer you hold the bow ready.
Also, there WERE enderman, they scared me!! SO I didnt go fight one

*chicken*
@Draak
Aw I dont think it will be that bad for you. Its hard to have a single player adventure game without leveling, and the eating animation is so funny I dont think the food bar will bother you toooo much.