Geez - this will spawn a whole new area of detection in casino security systems. High resolution cameras capable of seeing the subtle reflective changes in the eyeball, EM detectors at the doors for finding the minuscule circuits on your eyes ...

I can also see the casinos' utopia coming to fruition: those without the smarts to count cards, without the expertise to play properly, without all their electronics gadgets, coming to play^W empty their wallets into buckets owned by the casinos.