There are also Mirror's Edge, Mount and Blade (Warband), Killzone 3, and others I can't think of at this moment. It's not an incredibly common feature, but the absence of it in some other games doesn't come across as a reason to not have in Skyrim, to me. If people like it, then people like it and it shouldn't matter if most games don't have it. :shrug:
Im not saying for a second I wouldn't but Skyrim because of this. In fact I don't know what would stop me buying it, but if it's going to be as realistic as possible this would be one of the things on my list. Again though i have been labelled a bit of a perfectionist, so my list is fairly long.