I wonder if casinos will start banning people from wearing Glass. I guess you could write some CV software to keep track of cards and then automatically display your probabilities, kind of like the graphics they show on TV when broadcasting poker.
It's already the law in Nevada; NRS 465.075 "Use or possession of device to obtain advantage at playing game in licensed gaming establishment"
There's going to be a problem when technology reaches the point that it's practical to embed a general-purpose computer with a decent neural interface in your skull.
Don't worry, they'll just create some scanner capable of finding out whether you have some stuff like that or not as early as at entrance.
I'm way ahead of you there.
And state gaming commissions are issuing directives to make it clear that Google Glass shouldn't be allowed.