I've seen someone use a foot pedal with an iPad and special software to do the job. Unfortunately I don't remember the name of the device. Hmm... this might be it:https://www.wired.com/gadgetlab/2010/07/ipad-sheet-music-foot-switch-is-a-real-page-turner/
Even cooler would be to know the music ourselves - if they can program the player piano - why can't we do that with our brains???