The only effect will be if a price was so different from one province to another that it completely overcame the cost of shipping and also the risks and delays of shipping.
I know that already there are B.C. wine consumers who purchase wine in Alberta. They do so illegally right now, and presumably they could do so legally if this bill passed, but the reality is that the price difference would have to be huge for that to have any kind of significant effect. The price differences within Canada are not huge. The price differences from one province to another are not very substantial.