If this "subtle" touch has not been known by now to be a narrative choice or not, it's most likely speculative bullshit.Some people have argued that the entire game is filtered through 47's own perception of the world. This is why everyone in Blood Money seems so grotesque and offensive, because to 47 they are. If true it would be a subtle touch that seems absolutely lost on the people reponsible for this trailer.
edit: I mean it would be cool if it was, but I think it was more along the lines of it being a game from that weird 2006 era.
double edit: Blood Money is so fondly looked at because it really is a previous generation game that was released on modern consoles. Play your old PS2/XBox games, and weep for our what games have now become!