A long long time ago, a friend of mine told me: You know why I love to read crime novels? Because they're the only ones where you know what the characters are having for lunch.
I didn't like The Girl Who Played With Fire, but I don't mind reading details like this, if the writing is good (it's not in the case of Larsson IMO). They add an element of... I don't know, familiarity maybe. They make the characters more real I think.
Besides, IMO it's not really important what the authors writes about, as long as it's well written. A well kown French writer wrote a book describing in detail the content of every appartment in a building (at least that's how I remember it, it's been a long time since I read it). The book is called Life, a User's Manual.