As the Raptors remarked, they have an entire country behind them, not just a city or a region which is pretty cool.
Basketball has never been really big in Canada in spite of Steve Nash's success at the sport and in spite of the fact that it's a Canadian invention. It will be interesting to see if it spreads in my native land because of the Raptors' victory, but I have a feeling it will never replace hockey.
I, personally, am a baseball fan and follow the Toronto Blue Jays -- our only MLB team here in Canada. The team is in a re-building phase and a long way from winning the World Series however.