Using NFC signals to power and update an E-ink display

This is incredibly cool. I can already think of a few interesting uses.

Some of those uses would depend upon being able to update both the E-ink display and also NFC tag memory with different contents at the same time. In that way, you could store human-readable content on the E-ink tag and store metadata on the NFC tag to download an app and then take some action when reading it with a smartphone or tablet.