It would have a material impact on the decision-making in the States. In particular, most people do their own travel planning now, especially in North America, and are booking online. They would see the Canadian dollar converted into U.S. dollars on whatever source they're using, so they would automatically see that found discount of roughly 20% on what normalized hotel stays would be, say, or air transportation.
On October 20th, 2014. See this statement in context.