it seems to me that for the first time (at least that I know of) Holmes and Watson are pretty much equals. Well, even in the Ritchie verse there is a sense that Watson has some other purpose other than following Holmes around and listening to his rambles and that he's very smart and useful too in his own way (while in the BBC version that's literally all Watson does and it's quite degrading to the character imho). One of the reasons why Lucy and Jude are my fave Watsons :)