Not really give a big impact because Switzerland isn't EU and they're relatively a small country.
Switzerland may be a small country, but their GDP for 2022 was about $800 billion, which ranks them among the top 10 richest countries in Europe. Size is completely irrelevant in this context.
It will be a big move if one of EU or US launch their CBDC.
Most of the members of the European Union have a single currency called the Euro, and for years there have been plans by the ECB for a digital euro, in addition to which they mention restrictions up to a maximum of 300 digital euros per person. There's no big deal wherever it happens, because what's the difference when you pay with a bank card or use a CBDC app?
Central bank digital currencies are one of the most misunderstood things and have absolutely nothing to do with Bitcoin and will not bring about any kind of financial revolution. Sweden does not have a CBDC, but it is a country where 98% of all payments are made digitally.