nothing has been promised (as usual) but it is highly likely that we will have dungeons with bosses, the the bosses will have good rare drops, such as special rings possessing powers similar to their own.
Hmm, since they also said there would be lots and lots of quests to complete, perhaps killing a boss is a quest requirement, and you turn it in to get the boss ring? That would take out the stealing it.
hmm your right, that would be a great idea, BUT then it would be less rare! because anybody can get the same quest, so then lots of people who were in the party would fill the quest requirement and such reducing the value and special-ness of owning your nifty boss ring.