Hi - yes, I have used foot controllers too. For me, my tablet is quite a "stretch" away from me, since I have a 2nd keyboard above my Genos ... I sometimes still turn by tapping it, but sometimes, I want to move my hand a lot less, a few inches from where I am playing, to turn a page. I already have so many foot pedals and a volume pedal, that I wanted to try using hand-based page-turning, such that I can have a device just a few inches above where I am playing.
Yes, if you have a small setup, and your tablet/laptop is very close "at hand", my little idea would not really be needed or useful. For me, where I have to make quite a hand/arm motion to reach my table, it ends up being handy to have this little control right near where I am playing. . .
Jim
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Genos / Tyros5 / HK Lucas Nano 600 / FTB Maxx 40a / EV ZX1A / Rock'n'Roller cart / Hauptwerk virtual pipe organ / misc other audio & music toys