Well, here is a question I would respond with. What is the incentive to vote if you're a Conservative in downtown Toronto or if you're a New Democrat in rural Saskatchewan? What's the motivation? If you're a Green Party supporter anywhere except for southern Vancouver Island, what's the incentive? You know, based on past evidence, that there is almost no chance that your vote is going to count. You are going to lose, so if you're a voter in those ridings, then you're not empowered to vote.
Now, maybe you will, because you're committed to the democratic process, or maybe you won't because there is just no point, but your vote isn't going to have the same weight that it would if you were a Conservative in rural Saskatchewan or a Liberal in downtown Toronto or a New Democrat in the western part of British Columbia.
I can't say for certain that electoral reform will change voter turnout, but I don't know if the current barriers are something we can address through electoral reform.