1) transactions are instant and free, ie giving over physical ownership of a pub/private key pair (this could be done via scan of a QR code)
2) no prior onboarding necessary (avoids the repeated question “do you have this wallet/app?”)
Before, if I didn’t have cash, to tip a valet I’d have to ask them “do you have Zelle or Venmo?”, then I’d get their details, then send them money. Here, I could just pull out my wallet, create a new wallet with the specific amount, show them the QR code and say “scan this and it’s yours”.
Basically bitcoin gift cards without the store-specific lock-in.