As I was watching "Mysteries at the Museum" they were showcasing a wearable computer made in the late 50's early 60's. Amazingly, this device not only accepted input and provided an incredibly accurate output, but it was also Wireless. AMAZING! What was even more interesting was its application. It was designed to show that math could predict the outcome of roulette. It was deemed by its creators to have been 100% successful and now resides at the MIT museum.
This device was made back in the day when a computer filled a room and required hard lines of communication and power. Now something of that base of power comes in a $5 digital watch. Keeping that in mind, we are about to hit a change in the integration of man and machine. Devices such as Google Glass will allow man to access additional powers. Granted, we're not going to put them on and fly like Superman to our next meeting.
We may not end up with laser beams from our eyes but we will obtain new capabilities. Looking at the previous example, how easy would it be to provide feedback to the wearer of these devices about the world around them. Picture this, you have you new Glasses. These provide you with discrete information about the world around you. Discrete here meaning, the rest of the world is not directly exposed to the same information as yourself. Unlike when you pull out your cellphone to check an email, these wearable interfaces will not allow anyone around you to see what you see.
So now you're in Las Vegas. Sitting at a blackjack table. Your new Glasses provide you with information about the world around you. I think you see where I'm going with this line. How does the casino know you're not running software that counts the cards? Counting cards, something anyone can really learn to do, but as you imbibe in the libations provided by the casino your accuracy will decline severely. Enter your Glasses, they can keep that info at your fingertips, or in this case your retinas. Counting cards is now a tool given to anyone with the right application on their device.
Let's look back at our previous example, roulette. Where the original device required direct input from the user, now with the camera you can just look at the wheel and ball to get the required information for the algorithm to process. Provided you're not running a bunch of other resource hogs on your new device it should provide you with the appropriate "bet" for the input.
This might even be able to work further on slot machines. Since they use a computer algorithm to randomize, it is possible that a counter or predictive algorithm could be made.
The point is that certain things are more public as a means of controlling unethical actions. As we move into this personally direct interaction with our technological augmentations we may have to enact social laws or business policy to keep ourselves from leveraging these new found abilities for... Evil!