In LBP you were stuck with Sackboy and other already created characters, and even though the physics could be manipulated a little, it wasn't to any great extent. Dreams is different. In Dreams YOU create everything, from the character, character animations to the way the character 'plays'. You have complete control over that aspect of the game, unlike LBP.
Exactly. This games is for those who actually have the imagination you would need for Minecraft along with people who are very artistic. I've got a wild imagination but Minecraft just isn't for me. But I do have the Dream of making my own game and Dreams will give me the tools to try.