Is it now considered taboo to criticize a valid concern about a video game? Simply because you can say "Oh, it's Bethesda, the games are always like this" does not equate to people criticizing an aspect of a game any less valid.
Yes, we know that gameplay wise it will be awesome. Yes, if the narrative is anything like New Vegas, it will be awesome. But these good things do not make the graphical criticism any less valid, especially since the predecessor-FO3- is seven years old.
And yes, we also know that us users will make mods to make the game look better. Yet again, the argument "it's always been like this" doesn't make the criticism irrelevant.
And before anyone says that I am just hating and was not going to buy the game anyway, I will probably do so because I enjoyed FO3 and NV so much.