World's Smallest RFID Chip Revealed by Hitachi

Hitachi announced today the world's smallest and thinnest RFID chip.

The Hitachi RFID chip measures 0.15x0.15mm and is 7.5 micrometer thin. Hitachi's current model on the market measures 0.4x0.4mm. Silicon-on-Insulator (SOI) technology is used to achieve this level of integration.
The Hitachi µ-Chip can wirelessly transmit a 128 bit (10^38) unique ID number. It is impossible to rewrite the data and thus provides a high level of authenticity.

This RFID chip is so tiny you might breathe it in if you are not careful - will RFID chips be the Asbestos of the future? I guess the photo shows salt, but it could be sugar too. The press-release does not specify it.
More details in this Hitachi press-release.

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