Please keep in mind that people like peter molyneux and todd howard promises just about anything to sell more games.
Apperently we could effect town economies in Skyrim and I still remember molyneux telling us there would be growing threes etc in fable.
However this is a truth with modifications, a shopkeeper can be replaised sometimes if there is a suiteble NPC to take over like a brother/sister, however thi is not the case with all shopkeepers.
This is exactly the type of thing that happened in Oblivion. In their prerelease we were told a lot of rubbish we never actually saw when Oblivion was released. It`s happened in other games like Total War ones too. they even know half that stuff won`t be in while they`re talking. This is why I don`t follow their prerelease hype anymore as I didn`t with Skyrim- that way I don`t get so angry any more because I don`t have high expectations.
It`s sad. Some will call it just market hype. I call it bare-faced lying.
They`ll do it again next time. I hope one day I find a publisher\games Dev that keeps to what he knows for sure will be in or says nothing.