As a consumer I'd prefer to visit Disney.ca vs Disney.com (just an example) because I know the site will be targetted to Canadian visitors and written to the Canadian point of view. But if I didn't know there was a .ca site for, say Spain or Austria, I'd probably type in the .com as a starting point. I think Disney, Sea World and Las Vegas have the right idea though, market their site in .ca to Canadians will encourage more people to click through with the expectation the site caters to Canadians.