You can have your black card and your credit card carved out of adamantium (just kidding, I would really like that), the only credit card I want is MasterCard's Display Card. MasterCard has been testing the card that comes with a LCD and touchscreen keypad, for some time and has now introduced it in Singapore. They say the added tech is for security: users can generate a one-time password as an authentication security measure.
At present, banking institutions that necessitate a higher level of security for their online banking services require the use of a separate authentication token or device. The innovative 2-in-1 device, which combines the functionality of a standard payment card with a state-of-the-art security token, currently reflects the customer's OTP. In future, this card could incorporate additional functionalities and be able to indicate other real time information such as available credit balance, loyalty or reward points, recent transactions, and other interactive information.
I'm in the camp of throwing a LCD screen and touchscreen keypad on as much things as you can. I don't even really care about the security function, I just like staring at screens. [Mastercard via CNET]