Contrary to popular belief, Caps have not always been the favoured currency in the world of Fallout, and I was thinking. What about using poker chips as money in this game? I mean, it's Vegas so it certainly fits the theme. Doesn't really have to be any different from the cap system from Fallout 3, but I think it'd add some flavour to the game.
I know it's a very minor idea, and it's not that important to say the least, but I figured I'd throw it out there anyway.