AbdulAlhazred
Legend
My interpretation of @thecasualoblivion 's point is this: resting for an hour may be cinematic (in some sense of that word), but is not action. Whereas getting your second wind during the course of a fight is not only cinematic (in some sense of that word) but is also action, in the sense of something resolved at the table in the course of play that contributes directly to the particpants' sense of, and emotinal investment in, the ingame situation.
Yeah, that's the way I feel about it. It is DRAMATIC when the paladin is about to go down and then triggers a heal, invokes her Cloak of the Walking Wounded, and all of a sudden drops an AP and goes wild. She leaps up and yells the name of her patron god and starts laying about her with a giant axe! The goblins almost overran her as they poured into the room, but now it is PAYBACK TIME! In DDN either the characters takes a round to drink a potion, or the cleric has to heal her with magic (granted her own healing is a sort of magic too, but the key is she's tapping into her own reserves, not getting juiced up by someone else). 4e also provides enough resources and couples them with healing powers and 2nd Wind in such a way that this sort of thing can play out many times a day, where the DDN cleric will be drained pretty quickly.