This sounds like a better alternative to bitcoin! I guess it requires a trusted central authority, but for most users that's a feature not a bug, and it sounds like it has a load of advantages:
Stored value cards are different from debit cards: Their value is physically stored on the chip, rather than the card just being a reference to some centrally maintained account.
As a consequence, they are usable completely offline and with very low latency.
- Faster transactions
- Can work "offline" (to some extent)
- No wasted energy calculating redundant sha256
- Able to rectify fraudulent transactions