Ok, I gotta throw in my two cents for Dark Souls. The final product does differ from the early videos and also the beta, but a lot of it has to do with the lighting. That original trailer was very dark and had some really wicked shadow effects, because at the time the game was centered around always carrying a torch, kinda like the old Doom 3 mechanic. However, that got scrapped, but in the beta the game was still very dark, but somewhat manageable without a torch. There were other changes though, mainly to magic - in the beta you could manually aim Soul Arrows, and if you clutched a staff with 2 hands your magic would actually be stronger. They nerfed these things at the last minute.
Anyway, back to graphics, the final product looks really good, but you can tell it's on a new engine. Now, here's the kicker - at times the character models and texture look a little low res and pixellated. I'm pretty sure this is because the game is running on the equivalent to "medium" settings on a PC, and I can almost guarantee the PC version and eventual PS4 version are going to look outstanding. The lighting is still really good, in fact I try to use a torch as much as possible just because it's cool, and something else I noticed, the further I get in the game the better the environments look. Frame rates are also locked in at about 30 fps, so no more blight town mess. I'll tag the next part, it isn't a huge spoiler but it will give you an idea of how well the game runs:
The beta area was roughly the midpoint of the main campaign, and the last few areas I've been through are just amazing. It's a very good looking game, and you PC users will be happy. I've sunk over 50 hours into this game and had plenty of time to stare at it. Hope this helps a little
