RFID, Cards, Video Games

I walked into an arcade here in Hong Kong, I saw something that must have been going on for a while but is new for me. Video games that integrate playing cards and a RFID memory card. So insert your master card into the system, then you take your player cards and can set your players up on the 'field' by laying them on the reader pad.
Then you as you play points get added or subtracted on your master card that you can use in the game or future games.
What is cool about this, is that the cards are read on the filed as they are played and moved around. You then use button's, joysticks to play as well. What is being shown is a Soccar game. But my favorite is a real time strategy game where several players can move armies (represented by their cards) on large virtual battles.
http://www.avantgaming.com/sangokushitaisen.html (this is the actual website of the
Sega game called Sangousha-Taisen )