"However, sleep is a normal experience for mortals. It is NOT a normal experience for an immortal. Suffice it to say that it is as close to the terror and despair of death as an immortal can come."http://www.imperial-library.info/tsobs/part06.shtml
Interesting ... it doesn't say that they
don't sleep - in fact, it confirms that they
do - but just not regularly.
They also eat, unless "your flesh tastes sweet" is a metaphorical quote.
Remember, though, that dead Daedra are reborn later on in their plane if "killed", so they are still immortal, really.
Without wishing to give too much away, it is a plotline in Shivering Isles.
I don't know if mortals reincarnate though. If they don't, then the traditional view on the "Nerevarine" is given all the more potency.
TES really is just the paradise of a dualist.
You know, I never considered that - what
does happen to mortals on Nirn when they die?
("No Sillicon Heaven? Then where do all the calculators go?" - Red Dwarf)
If everyone reincarnates, then it would be strange for it to be so many centuries before Nerevar is reborn ...? :shrug: