The only immediate impact I foresee is that vendors might be more willing to accept credit card especially for small amounts. Second, continues to support the idea that nothing is free. Someone always pay. At moment I don't see it spreading here because of the heavy, current, anti-regulations in Congress because this would require a similar regulation. It is a huge drop from 3 to 5% down to less than one percent. The difference has to be made up somewhere.
PS Had a second thought. It could mean that the credit card charges in Europe would not earn the same benefits/rewards that the card would earn in the US. That might push back to using more cash. Probably will lose the discount for cash that is often available in Europe and never in the US. A very mixed bag.