For music, lyric sheets and lead sheets, I wish they would make a E-ink unit that was built for the musician and not for the book reading community. Hal Leonard should do something with a direct link so you could even buy the music at the gig.
This is close...
http://www.amazon.com/gp/product/B002GYWHSQ/ref=fs_dxOnly 9.? inches... 13" would be primo!
OR... a display for the musician and a wireless, bigger display for sing alongs or to advertise who you are in a high tech way. Once OLED tech gets better and cheaper it may be possible to do what I want. 10 - 15 years down the road... maybe?!?