> Having this will be an awesome replacement to the limitations of the visa/mastercard monopoly

Yes, they are a 2-3% leech on the economy in the US. In Europe, the regulators there have kept it a bit lower, which is reflected in EU credit cards having few benefits and high fees.

> I wonder how they will implement the infrastructure.

That's also what I wonder. A description of the cryptography and system would be interesting.

If this is only as anonymous as cash (i.e. unique serial numbers on every bill), then this would still be a step backwards, as it would be trivial to track individual e-bills around.

I am also surprised that they allow up to €3,000. This would make smuggling far easier/denser than physical €500/CHF1,000/USD100 notes. It could even allow a relay-attack smuggling, where the wallet is located far away from where the funds are used.