I'm very afraid that outside of making sure that the competitive laws of Canada are working and that competition is governing behaviour, this will result in unintended effects, specifically a reduction in competition and an exiting of the market by small players, creating barriers to entry and those sorts of thing. However, I do think a regime that's targeted at making sure merchants fully understand the contracts and costs associated with accepting all sorts of card-based payments is a very important component of the scene that's missing right now.
On May 14th, 2009. See this statement in context.