Credit goes to the first developer who creates a blackjack card counting app for the device.
Either that or casinos would change their games.
Anyway, you can already do card counting via computer pretty easily at a casino if you think about it--I'm pretty sure they don't care enough to stop you as long as you aren't obvious and you aren't robbing them.
Captcha playing card decks, perhaps?
And read up on the history of the early card counters and their shoe computers. It's a colorful story.