It's possible to be done with Robosats nowadays but clearly it's not obvious, so nobody is aware of it.

I think the only thing missing to make things easier is allowing the Robot to use blossom servers to upload pictures or the QR itself. Nice feature to work on 😁

yes speed is crucial for this ux to be decent. my hope is that at some point there will be automated taker bots, that will take and pay offers, then upload receipt automatically. will only work to the degree that a fiat provider is automatable though...

Delays for online shopping are ok and expected but not for in-person.

As much as I'd be stoked to watch someone making me wait a little longer while they figure out LN, that's not what I went to the store for.

Maybe if this was like an ATM type thing where they can go exchange it on the other corner of store then come back to the register when they're ready to pay, then maybe.