Yep, good point.

Another interesting use case would be using the card as part of a crypto escrow.

The problems being solved here are:

- walking around with a device that can access a large wallet that could be accessed under duress or coercion

- Key Pairs are hard to remember and type

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- pre-pay an escrow online with $100

- have a payment card in your pocket

- meet person with another card

- set a payment amount

- touch cards

- escrow unlocks the amount as soon as either card pushes the update online - which if online could be immediately

- card confirms the transaction??

- can also delay the transaction, and if both cards are lost in the meantime, the transaction doesn't go through

- can also specify the payment amount as "set later"

- receiver can also request an amount

- escrow can be funded after the meeting

- good for 1:many payments too, eg splitting a bill

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cards could also be Key Pair generators, for transferring public keys to other cards, with the exchange recorded for later use. No escrow required. A lot of benefits over handing out printed QR codes of addresses.