It's one of the important things. I will answer your first question about the converging technologies, and I will answer in French because it's easier for me to do so.
Even a blank CD can be used for something else than music. For example, photographs and text can be stored on them. Nevertheless, a levy was applied to blank CDs. However, when it established what the amount should be per blank CD, the Copyright Board of Canada took the other uses into consideration and accordingly reduced the amount of the levy per blank CD. You can store photos and even other things on an iPod Nano. The levy can be adjusted to take into account these other potential uses.
As for convergence, as new technologies develop... In 1997, when the act was passed, it was supposed to be technologically neutral. That's what we were told. You can even consult the English version of the act. You will see that it applies to audio media—