Related demo at CES 2012: http://www.engadget.com/2012/01/11/nxp-gesture-smart-card-nfc/
A glimpse of secure online shopping in the future: When shopping on the Internet, you can present a contactless card as an alternative to keying in personal data. Using the on-card gesture recognition card, you can "draw" your PIN on the card itself with your fingertips, making your data less susceptible to man-in-the-middle attacks and keylogger software. In this demo, we also show how the card is trained to recognize an individual's writing style.
Presented by NXP® Semiconductors at CARTES & IDentification 2011.