I can not even tell you how happy I was when I was reading this article. Makes me want to go out and get this copy of the magazine for myself. Go here for the full article http://www.guildwars2guru.com/forum/guild-wars-2-exclusive-uk-t9324.html
Basically, this article talks a LOT about dungeons in GW2, and it sounds pretty much amazing. The same dungeon changes over and over again so that it's not the same every time you replay it. New cutscenes are added in to each one every time so that you never have to watch the same one twice, and the reward system will be similar to DoA in that you apparently won't be getting a reward drop from the chest (armor, weapons, etc.), but rather an item that you will then take to an armorer or a weaponsmith to trade for what it is you want, that way you aren't getting the same item over and over again until you finally get that one that you want.
Ladies and Gentlemen, I'm in love.