The Gvido Digital Music Score is a double-screened e-ink device intended to be used primarily for displaying sheet music. The company sells a wireless footpad as an accessory that can be tapped to turn pages automatically.
It’s a intriguing idea, and I’m kind of surprised we haven’t seen more special purpose e-ink and LCD-based devices for specific tasks like this.
That said, this device retails for $1,600 and initial reviews haven’t been positive. Not surprisingly, the issue that really kills a lot of specialty devices like this is the software rather than the hardware.