Definitely a good point, particularly that bitcoin will have credit mechanisms built on top of it. Maybe I'm wrong, but I think that the point of bitcoin is that any credit mechanism built on top of it wouldn't have the same problems of identity fraud.

I also don't think the article is necessarily saying that we will have different crypto-currencies for each business, just that we already use a bunch of different payment methods (points, air miles, credit, etc.) and it will be faster and easier to choose which one you use.