Technology explained (Score 1)

For the record: They are not embedding games onto cards. The cards just provide a key into the hardware of the eReader, which already has the contents of the games contained in it. This has been going on in Japan for some time now. The 'eye-opening' technology discussed here is the same as that used in grocery-store UPCs.
The specific use for this technology is a tie-in with the game 'Animal Crossing' for the GameCube. IGN's preview for the game discusses the full list of games available.