Should be interesting, as there is a substantial Muslim population in Quebec, so if French Quebec is allowed to be a nation within a nation, it won't be long before Muslims do the same. Or Hispanic or Latinos, and yes they have sizable populations in other provinces in Canada.
At basest, it will probably be much the same as American Reservations, where they are nations within a nation, beholden to their own laws and decrees. How else could there be casinos and other gambling institutions in non-gambling (barring lotteries and similar incarnations) states such as Arizona?
At worst, I could see Quebec splitting off and forming their own government and military, much like the US based New Black Panthers wants to do with California, and how the US based Christian Neo-Nazis want to do with Canadian border states.