http://4.bp.blogspot.com/-Y10Pr7lcDh4/UGeEYZVFr9I/AAAAAAAACI8/oq-r3ji7mUs/s1600/BUZZKILL7.jpg
Rather fitting, i think, for the topic at hand... Anyway, it wasn't my intent to be a buzzkill, and i do agree that i am highly skeptical of Bethesda's ability to pull of Blackmarsh in such an interesting way, the point was in regards to the idea that Hammerfell would be somehow more revolutionary than Blackmarsh.
Whatever the case... There is a risk of putting too much emphasis on survival, and not enough on exploration. One reason that newer TES games flourish, where older games (such as Daggerfall) were a far more niche community (even accounting for the gaming dynamics of that generation) is the ability to travel and explore without an abundance of more... Meta concerns. In the days of Daggerfall, you had to be careful to scout out towns near a dungeon you were going to clear to ensure that there were temples and proper shops nearby. Far too often a novice player would travel half way across the province to explore a dungeon, unknowingly catch the Plague, and then die in transit back to sell their loot. Realistic? Maybe. Fun? To a very select group.
Overly complicated and realistic survival dynamics create an extremely steep learning curve which, frankly is only attractive to a small minority of players. We often hear the cries of this minority (and before anyone gets snarky, i am one of them, i just don't mouth off and bemoan ever decision) because, as with most such cases, the majority is content to play the game, while the minority vents their frustration here. Unfortunately, we aren't the ones who keep these games going. With the development costs of games like this, in the current world, I could be surprised if the hardcoe game the 'traditionalists' demand would break even.
At the same time, elements of that survival would be more than welcome, in a toned down complexity, in hardcoe mode. Having to eat and drink (done automatically), to sleep, having more dangerous poisons, and even limited temperature (Frostfall actually did this very well) dynamics are all achievable, and have been shown to be achievable, and would be welcomed by a good number of the so called 'casual' crowed as well.
But a truly realistic, in depth survival dynamic, be it in Skyrim, Hammerfell or Blackmarsh, i think, would do more damage to the game than good. I'd buy it, but i'd rather have a dozen mediocre games over the nest 50 years than one great game i have to look back on and lament never having a sequel.