Huh? A song two pages long? Oh yeah, sheet music!
If/when E-ink readers becomes commonplace, there
will be a demand for remote page turners, especially for musicians. When you're playing an instrument, you have to time things to pause, reach out, and turn the page. With a remote page turner (wired or wireless) you could use your foot to turn the page. I would expect both wired and wireless models would be made, since wired models are cheaper. (However, there may come a time when wireless technology is cheaper.)
As for the Reader, I agree with Bob on both the pros and the cons. I
think you could make a wired page turner that would only need power when you push the button, but I am not an engineer. Perhaps scotty1024 knows enough to make a definitive answer.