Here is a photo of one my rigs, showing how the Digit III page-turner device is about 6" from my hand in playing position, while my iPad's "where to tap for next page" is about 20" away (and 14" back or 14" away from me). I could figure out a way to mount the iPad a bit lower perhaps ... but having the Digit III only a few inches from where my hand is on the keyboard, still seems like a convenience for me.

It might also be useful for people using laptops for music display, where they don't have touch-screens on them.

Jim