Just a bit of speculation... I just started using glass screen protectors a few months ago and absolutely love it (don't have to worry about scratches). Btw, I use the BodyGuardz Pure. I wonder if glass screen protectors will work on the iPhone 5S. I can see the cutout in the glass for the button creating interference with the fingerprint reader. I'd like to order one so that I can have one on hand the day my new phone shows up.